15507500920 has 32 divisors (see below), whose sum is σ = 35333553600. Its totient is φ = 6124480128.

The previous prime is 15507500849. The next prime is 15507500923. The reversal of 15507500920 is 2900570551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15507500923) 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 7 ways as a sum of consecutive naturals, for example, 2450559 + ... + 2456878.

It is an arithmetic number, because the mean of its divisors is an integer number (1104173550).

Almost surely, 2^15507500920 is an apocalyptic number.

15507500920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15507500920 is an abundant number, since it is smaller than the sum of its proper divisors (19826052680).

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

15507500920 is a wasteful number, since it uses less digits than its factorization.

15507500920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4907527 (or 4907523 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 34.

The spelling of 15507500920 in words is "fifteen billion, five hundred seven million, five hundred thousand, nine hundred twenty".