15815938080 has 48 divisors (see below), whose sum is σ = 49820206464. Its totient is φ = 4217583360.

The previous prime is 15815938051. The next prime is 15815938141. The reversal of 15815938080 is 8083951851.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16474456 + ... + 16475415.

It is an arithmetic number, because the mean of its divisors is an integer number (1037920968).

Almost surely, 2^15815938080 is an apocalyptic number.

15815938080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15815938080 is an abundant number, since it is smaller than the sum of its proper divisors (34004268384).

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

15815938080 is a wasteful number, since it uses less digits than its factorization.

15815938080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32949889 (or 32949881 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 48.

The spelling of 15815938080 in words is "fifteen billion, eight hundred fifteen million, nine hundred thirty-eight thousand, eighty".