15128757512 has 32 divisors (see below), whose sum is σ = 30950164800. Its totient is φ = 6875601600.

The previous prime is 15128757509. The next prime is 15128757533. The reversal of 15128757512 is 21575782151.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 820814 + ... + 839042.

It is an arithmetic number, because the mean of its divisors is an integer number (967192650).

Almost surely, 2^15128757512 is an apocalyptic number.

It is an amenable number.

15128757512 is an abundant number, since it is smaller than the sum of its proper divisors (15821407288).

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

15128757512 is a wasteful number, since it uses less digits than its factorization.

15128757512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27677 (or 27673 counting only the distinct ones).

The product of its digits is 196000, while the sum is 44.

The spelling of 15128757512 in words is "fifteen billion, one hundred twenty-eight million, seven hundred fifty-seven thousand, five hundred twelve".