100797138865 has 16 divisors (see below), whose sum is σ = 121931840448. Its totient is φ = 79989425856.

The previous prime is 100797138863. The next prime is 100797138907. The reversal of 100797138865 is 568831797001.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 100797138865 - 2¹ = 100797138863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100797138863) 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, 308007 + ... + 544483.

It is an arithmetic number, because the mean of its divisors is an integer number (7620740028).

Almost surely, 2^100797138865 is an apocalyptic number.

It is an amenable number.

100797138865 is a deficient number, since it is larger than the sum of its proper divisors (21134701583).

100797138865 is a wasteful number, since it uses less digits than its factorization.

100797138865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237168.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 100797138865 in words is "one hundred billion, seven hundred ninety-seven million, one hundred thirty-eight thousand, eight hundred sixty-five".