15725028644 has 48 divisors (see below), whose sum is σ = 30405715200. Its totient is φ = 7069666560.

The previous prime is 15725028629. The next prime is 15725028673. The reversal of 15725028644 is 44682052751.

It is a junction number, because it is equal to n+sod(n) for n = 15725028595 and 15725028604.

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, 1450757 + ... + 1461555.

It is an arithmetic number, because the mean of its divisors is an integer number (633452400).

Almost surely, 2^15725028644 is an apocalyptic number.

It is an amenable number.

15725028644 is a deficient number, since it is larger than the sum of its proper divisors (14680686556).

15725028644 is a wasteful number, since it uses less digits than its factorization.

15725028644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11540 (or 11538 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 44.

The spelling of 15725028644 in words is "fifteen billion, seven hundred twenty-five million, twenty-eight thousand, six hundred forty-four".