115021640613 has 16 divisors (see below), whose sum is σ = 168306034176. Its totient is φ = 69292656240.

The previous prime is 115021640579. The next prime is 115021640641. The reversal of 115021640613 is 316046120511.

It is a happy number.

It is not a de Polignac number, because 115021640613 - 2⁹ = 115021640101 is a prime.

It is a super-2 number, since 2×115021640613² (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 (115021640113) 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, 10430131 + ... + 10441152.

It is an arithmetic number, because the mean of its divisors is an integer number (10519127136).

Almost surely, 2^115021640613 is an apocalyptic number.

It is an amenable number.

115021640613 is a deficient number, since it is larger than the sum of its proper divisors (53284393563).

115021640613 is a wasteful number, since it uses less digits than its factorization.

115021640613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20871464.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 115021640613 in words is "one hundred fifteen billion, twenty-one million, six hundred forty thousand, six hundred thirteen".