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12810206761 = 113313518321
BaseRepresentation
bin10111110111000110…
…00011111000101001
31020001202122221002021
423323203003320221
5202213403104021
65515051104441
7632306650402
oct137343037051
936052587067
1012810206761
115484033a40
122596142121
131291c7c401
148974829a9
154ee961c41
hex2fb8c3e29

12810206761 has 8 divisors (see below), whose sum is σ = 14016994848. Its totient is φ = 11610456000.

The previous prime is 12810206749. The next prime is 12810206789. The reversal of 12810206761 is 16760201821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12810206761 - 217 = 12810075689 is a prime.

It is a super-2 number, since 2×128102067612 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12810206861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755520 + ... + 1762801.

It is an arithmetic number, because the mean of its divisors is an integer number (1752124356).

Almost surely, 212810206761 is an apocalyptic number.

12810206761 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12810206761 is a deficient number, since it is larger than the sum of its proper divisors (1206788087).

12810206761 is a wasteful number, since it uses less digits than its factorization.

12810206761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3518663.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 12810206761 in words is "twelve billion, eight hundred ten million, two hundred six thousand, seven hundred sixty-one".

Divisors: 1 11 331 3641 3518321 38701531 1164564251 12810206761