15500790100 has 18 divisors (see below), whose sum is σ = 33636714734. Its totient is φ = 6200316000.

The previous prime is 15500790059. The next prime is 15500790103. The reversal of 15500790100 is 109700551.

It can be written as a sum of positive squares in 3 ways, for example, as 530288784 + 14970501316 = 23028^2 + 122354^2 .

It is a super-3 number, since 3×15500790100³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15500790103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77503851 + ... + 77504050.

Almost surely, 2^15500790100 is an apocalyptic number.

15500790100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15500790100 is an abundant number, since it is smaller than the sum of its proper divisors (18135924634).

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

15500790100 is a wasteful number, since it uses less digits than its factorization.

15500790100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155007915 (or 155007908 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 28.

The spelling of 15500790100 in words is "fifteen billion, five hundred million, seven hundred ninety thousand, one hundred".