155011100100 has 72 divisors (see below), whose sum is σ = 448561686048. Its totient is φ = 41330496000.

The previous prime is 155011100093. The next prime is 155011100131. The reversal of 155011100100 is 1001110551.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 155011100100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2372875 + ... + 2437325.

Almost surely, 2^155011100100 is an apocalyptic number.

155011100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155011100100 is an abundant number, since it is smaller than the sum of its proper divisors (293550585948).

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

155011100100 is a wasteful number, since it uses less digits than its factorization.

155011100100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72485 (or 72478 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 15.

Adding to 155011100100 its reverse (1001110551), we get a palindrome (156012210651).

The spelling of 155011100100 in words is "one hundred fifty-five billion, eleven million, one hundred thousand, one hundred".