15728649984 has 90 divisors (see below), whose sum is σ = 46900050120. Its totient is φ = 5242876416.

The previous prime is 15728649983. The next prime is 15728649991. The reversal of 15728649984 is 48994682751.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15728649983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 358524 + ... + 399995.

It is an arithmetic number, because the mean of its divisors is an integer number (521111668).

Almost surely, 2^15728649984 is an apocalyptic number.

It is an amenable number.

15728649984 is an abundant number, since it is smaller than the sum of its proper divisors (31171400136).

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

15728649984 is an frugal number, since it uses more digits than its factorization.

15728649984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758547 (or 758524 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 63.

The spelling of 15728649984 in words is "fifteen billion, seven hundred twenty-eight million, six hundred forty-nine thousand, nine hundred eighty-four".