100115506665 has 24 divisors (see below), whose sum is σ = 173548934208. Its totient is φ = 53390201760.

The previous prime is 100115506651. The next prime is 100115506693. The reversal of 100115506665 is 566605511001.

It is not a de Polignac number, because 100115506665 - 2¹⁷ = 100115375593 is a prime.

It is a super-2 number, since 2×100115506665² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447670 + ... + 632960.

It is an arithmetic number, because the mean of its divisors is an integer number (7231205592).

Almost surely, 2^100115506665 is an apocalyptic number.

100115506665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100115506665 is a deficient number, since it is larger than the sum of its proper divisors (73433427543).

100115506665 is a wasteful number, since it uses less digits than its factorization.

100115506665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197309 (or 197306 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The spelling of 100115506665 in words is "one hundred billion, one hundred fifteen million, five hundred six thousand, six hundred sixty-five".