130688757081 has 9 divisors (see below), whose sum is σ = 188774215669. Its totient is φ = 87125115036.

The previous prime is 130688757011. The next prime is 130688757113. The reversal of 130688757081 is 180757886031.

It is a happy number.

The square root of 130688757081 is 361509.

It is a perfect power (a square), and thus also a powerful number.

130688757081 is a `hidden beast` number, since 1 + 3 + 0 + 68 + 8 + 7 + 570 + 8 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 130688757081 - 2¹¹ = 130688755033 is a prime.

It is a super-2 number, since 2×130688757081² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130688757011) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1024276 + ... + 1144778.

Almost surely, 2^130688757081 is an apocalyptic number.

130688757081 is the 361509-th square number.

130688757081 is the 180755-th centered octagonal number.

It is an amenable number.

130688757081 is a deficient number, since it is larger than the sum of its proper divisors (58085458588).

130688757081 is an frugal number, since it uses more digits than its factorization.

130688757081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241012 (or 120506 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 54.

The spelling of 130688757081 in words is "one hundred thirty billion, six hundred eighty-eight million, seven hundred fifty-seven thousand, eighty-one".