115137640015 has 4 divisors (see below), whose sum is σ = 138165168024. Its totient is φ = 92110112008.

The previous prime is 115137639949. The next prime is 115137640031. The reversal of 115137640015 is 510046731511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510046731511 = 5233 ⋅97467367.

It is a cyclic number.

It is not a de Polignac number, because 115137640015 - 2⁷ = 115137639887 is a prime.

It is a super-2 number, since 2×115137640015² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11513763997 + ... + 11513764006.

It is an arithmetic number, because the mean of its divisors is an integer number (34541292006).

Almost surely, 2^115137640015 is an apocalyptic number.

115137640015 is a deficient number, since it is larger than the sum of its proper divisors (23027528009).

115137640015 is an equidigital number, since it uses as much as digits as its factorization.

115137640015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23027528008.

The product of its (nonzero) digits is 12600, while the sum is 34.

The spelling of 115137640015 in words is "one hundred fifteen billion, one hundred thirty-seven million, six hundred forty thousand, fifteen".