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13661152060 = 2251740179859
BaseRepresentation
bin11001011100100010…
…01010001100111100
31022021001212102120211
430232101022030330
5210434223331220
610135325522204
7662351606443
oct145621121474
938231772524
1013661152060
115880400816
122793113364
13139935ba3a
149384add5a
1554e4edb5a
hex32e44a33c

13661152060 has 24 divisors (see below), whose sum is σ = 30375974160. Its totient is φ = 5143021824.

The previous prime is 13661152051. The next prime is 13661152069. The reversal of 13661152060 is 6025116631.

It is an interprime number because it is at equal distance from previous prime (13661152051) and next prime (13661152069).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661152069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20089590 + ... + 20090269.

It is an arithmetic number, because the mean of its divisors is an integer number (1265665590).

Almost surely, 213661152060 is an apocalyptic number.

13661152060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13661152060 is an abundant number, since it is smaller than the sum of its proper divisors (16714822100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13661152060 is a wasteful number, since it uses less digits than its factorization.

13661152060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40179885 (or 40179883 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

Adding to 13661152060 its reverse (6025116631), we get a palindrome (19686268691).

The spelling of 13661152060 in words is "thirteen billion, six hundred sixty-one million, one hundred fifty-two thousand, sixty".

Divisors: 1 2 4 5 10 17 20 34 68 85 170 340 40179859 80359718 160719436 200899295 401798590 683057603 803597180 1366115206 2732230412 3415288015 6830576030 13661152060