100662155172 has 18 divisors (see below), whose sum is σ = 254451558998. Its totient is φ = 33554051712.

The previous prime is 100662155159. The next prime is 100662155183. The reversal of 100662155172 is 271551266001.

100662155172 is a `hidden beast` number, since 10 + 0 + 6 + 6 + 21 + 551 + 72 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100548604836 + 113550336 = 317094^2 + 10656^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2796170977 = 100662155172 / (1 + 0 + 0 + 6 + 6 + 2 + 1 + 5 + 5 + 1 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1398085453 + ... + 1398085524.

Almost surely, 2^100662155172 is an apocalyptic number.

100662155172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

100662155172 is an abundant number, since it is smaller than the sum of its proper divisors (153789403826).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100662155172 is a wasteful number, since it uses less digits than its factorization.

100662155172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796170987 (or 2796170982 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The spelling of 100662155172 in words is "one hundred billion, six hundred sixty-two million, one hundred fifty-five thousand, one hundred seventy-two".