15785625828 has 48 divisors (see below), whose sum is σ = 44310533120. Its totient is φ = 4272800544.

The previous prime is 15785625827. The next prime is 15785625851. The reversal of 15785625828 is 82852658751.

15785625828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (15785625827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4943776 + ... + 4946967.

Almost surely, 2^15785625828 is an apocalyptic number.

It is an amenable number.

15785625828 is an abundant number, since it is smaller than the sum of its proper divisors (28524907292).

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

15785625828 is a wasteful number, since it uses less digits than its factorization.

15785625828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9890776 (or 9890774 counting only the distinct ones).

The product of its digits is 10752000, while the sum is 57.

The spelling of 15785625828 in words is "fifteen billion, seven hundred eighty-five million, six hundred twenty-five thousand, eight hundred twenty-eight".