15787130681 has 16 divisors (see below), whose sum is σ = 18355991808. Its totient is φ = 13297089600.

The previous prime is 15787130629. The next prime is 15787130683. The reversal of 15787130681 is 18603178751.

It is a cyclic number.

It is not a de Polignac number, because 15787130681 - 2²⁶ = 15720021817 is a prime.

It is a super-2 number, since 2×15787130681² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (15787130683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436511 + ... + 471291.

It is an arithmetic number, because the mean of its divisors is an integer number (1147249488).

Almost surely, 2^15787130681 is an apocalyptic number.

It is an amenable number.

15787130681 is a deficient number, since it is larger than the sum of its proper divisors (2568861127).

15787130681 is a wasteful number, since it uses less digits than its factorization.

15787130681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35912.

The product of its (nonzero) digits is 282240, while the sum is 47.

The spelling of 15787130681 in words is "fifteen billion, seven hundred eighty-seven million, one hundred thirty thousand, six hundred eighty-one".