15534312500 has 84 divisors (see below), whose sum is σ = 38836377888. Its totient is φ = 5325900000.

The previous prime is 15534312487. The next prime is 15534312517. The reversal of 15534312500 is 521343551.

It is a congruent number.

It is an unprimeable number.

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 27 ways as a sum of consecutive naturals, for example, 419747 + ... + 455253.

It is an arithmetic number, because the mean of its divisors is an integer number (462337832).

Almost surely, 2^15534312500 is an apocalyptic number.

15534312500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15534312500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19418188944).

15534312500 is an abundant number, since it is smaller than the sum of its proper divisors (23302065388).

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

15534312500 is an frugal number, since it uses more digits than its factorization.

15534312500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35548 (or 35521 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 15534312500 in words is "fifteen billion, five hundred thirty-four million, three hundred twelve thousand, five hundred".