102815944917 has 16 divisors (see below), whose sum is σ = 159627991680. Its totient is φ = 57643440192.

The previous prime is 102815944901. The next prime is 102815944943. The reversal of 102815944917 is 719449518201.

It is not a de Polignac number, because 102815944917 - 2⁴ = 102815944901 is a prime.

It is a super-2 number, since 2×102815944917² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102815944917.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102815944967) 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, 46187542 + ... + 46189767.

It is an arithmetic number, because the mean of its divisors is an integer number (9976749480).

Almost surely, 2^102815944917 is an apocalyptic number.

It is an amenable number.

102815944917 is a deficient number, since it is larger than the sum of its proper divisors (56812046763).

102815944917 is an equidigital number, since it uses as much as digits as its factorization.

102815944917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92377372.

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 102815944917 in words is "one hundred two billion, eight hundred fifteen million, nine hundred forty-four thousand, nine hundred seventeen".