15900705604 has 27 divisors (see below), whose sum is σ = 32372887743. Its totient is φ = 6813831528.

The previous prime is 15900705599. The next prime is 15900705607. The reversal of 15900705604 is 40650700951.

The square root of 15900705604 is 126098.

It is a perfect power (a square), and thus also a powerful number.

It is not an unprimeable number, because it can be changed into a prime (15900705607) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1760869 + ... + 1769875.

Almost surely, 2^15900705604 is an apocalyptic number.

15900705604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

15900705604 is the 126098-th square number.

It is an amenable number.

15900705604 is an abundant number, since it is smaller than the sum of its proper divisors (16472182139).

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

15900705604 is an frugal number, since it uses more digits than its factorization.

15900705604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18032 (or 9016 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 15900705604 in words is "fifteen billion, nine hundred million, seven hundred five thousand, six hundred four".