155665016100 has 108 divisors (see below), whose sum is σ = 532280046480. Its totient is φ = 37736971200.

The previous prime is 155665016063. The next prime is 155665016107. The reversal of 155665016100 is 1610566551.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (155665016107) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7851970 + ... + 7871769.

Almost surely, 2^155665016100 is an apocalyptic number.

155665016100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155665016100 is an abundant number, since it is smaller than the sum of its proper divisors (376615030380).

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

155665016100 is a wasteful number, since it uses less digits than its factorization.

155665016100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15723770 (or 15723760 counting only the distinct ones).

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

The spelling of 155665016100 in words is "one hundred fifty-five billion, six hundred sixty-five million, sixteen thousand, one hundred".