130635687681 has 8 divisors (see below), whose sum is σ = 193534352160. Its totient is φ = 87090458436.

The previous prime is 130635687643. The next prime is 130635687691. The reversal of 130635687681 is 186786536031.

130635687681 is a `hidden beast` number, since 1 + 3 + 0 + 6 + 3 + 568 + 76 + 8 + 1 = 666.

It is not a de Polignac number, because 130635687681 - 2²⁷ = 130501469953 is a prime.

It is a super-2 number, since 2×130635687681² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (130635687691) 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, 2419179375 + ... + 2419179428.

It is an arithmetic number, because the mean of its divisors is an integer number (24191794020).

Almost surely, 2^130635687681 is an apocalyptic number.

It is an amenable number.

130635687681 is a deficient number, since it is larger than the sum of its proper divisors (62898664479).

130635687681 is an equidigital number, since it uses as much as digits as its factorization.

130635687681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838358812 (or 4838358806 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 130635687681 in words is "one hundred thirty billion, six hundred thirty-five million, six hundred eighty-seven thousand, six hundred eighty-one".