115617521613 has 16 divisors (see below), whose sum is σ = 168185281536. Its totient is φ = 70065249840.

The previous prime is 115617521573. The next prime is 115617521633. The reversal of 115617521613 is 316125716511.

It is not a de Polignac number, because 115617521613 - 2¹⁰ = 115617520589 is a prime.

It is a super-2 number, since 2×115617521613² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115617521633) 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, 260220 + ... + 546762.

It is an arithmetic number, because the mean of its divisors is an integer number (10511580096).

Almost surely, 2^115617521613 is an apocalyptic number.

It is an amenable number.

115617521613 is a deficient number, since it is larger than the sum of its proper divisors (52567759923).

115617521613 is a wasteful number, since it uses less digits than its factorization.

115617521613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298784.

The product of its digits is 37800, while the sum is 39.

The spelling of 115617521613 in words is "one hundred fifteen billion, six hundred seventeen million, five hundred twenty-one thousand, six hundred thirteen".