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13180768881 = 371877334393
BaseRepresentation
bin11000100011010001…
…01001001001110001
31021000120221102202020
430101220221021301
5203443234101011
610015525342053
7644426454420
oct142150511161
937016842666
1013180768881
115654222825
12267a267929
131320984837
148d07832b7
1552225d006
hex311a29271

13180768881 has 16 divisors (see below), whose sum is σ = 20095741824. Its totient is φ = 7527832704.

The previous prime is 13180768879. The next prime is 13180768897. The reversal of 13180768881 is 18886708131.

It is not a de Polignac number, because 13180768881 - 21 = 13180768879 is a prime.

It is a super-2 number, since 2×131807688812 (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13180768841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127780 + ... + 206613.

It is an arithmetic number, because the mean of its divisors is an integer number (1255983864).

Almost surely, 213180768881 is an apocalyptic number.

It is an amenable number.

13180768881 is a deficient number, since it is larger than the sum of its proper divisors (6914972943).

13180768881 is a wasteful number, since it uses less digits than its factorization.

13180768881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336280.

The product of its (nonzero) digits is 516096, while the sum is 51.

The spelling of 13180768881 in words is "thirteen billion, one hundred eighty million, seven hundred sixty-eight thousand, eight hundred eighty-one".

Divisors: 1 3 7 21 1877 5631 13139 39417 334393 1003179 2340751 7022253 627655661 1882966983 4393589627 13180768881