15128815530 has 32 divisors (see below), whose sum is σ = 36314158464. Its totient is φ = 4033795136.

The previous prime is 15128815519. The next prime is 15128815543. The reversal of 15128815530 is 3551882151.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216499 + ... + 277721.

It is an arithmetic number, because the mean of its divisors is an integer number (1134817452).

Almost surely, 2^15128815530 is an apocalyptic number.

15128815530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15128815530 is an abundant number, since it is smaller than the sum of its proper divisors (21185342934).

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

15128815530 is a wasteful number, since it uses less digits than its factorization.

15128815530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69470.

The product of its (nonzero) digits is 48000, while the sum is 39.

The spelling of 15128815530 in words is "fifteen billion, one hundred twenty-eight million, eight hundred fifteen thousand, five hundred thirty".