1625921736 has 32 divisors (see below), whose sum is σ = 4068217440. Its totient is φ = 541518848.

The previous prime is 1625921723. The next prime is 1625921809. The reversal of 1625921736 is 6371295261.

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, 1375 + ... + 57041.

It is an arithmetic number, because the mean of its divisors is an integer number (127131795).

Almost surely, 2^1625921736 is an apocalyptic number.

It is an amenable number.

1625921736 is an abundant number, since it is smaller than the sum of its proper divisors (2442295704).

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

1625921736 is a wasteful number, since it uses less digits than its factorization.

1625921736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56893 (or 56889 counting only the distinct ones).

The product of its digits is 136080, while the sum is 42.

The square root of 1625921736 is about 40322.7198487404. The cubic root of 1625921736 is about 1175.8895900324.

It can be divided in two parts, 16259217 and 36, that added together give a triangular number (16259253 = T₅₇₀₂).

The spelling of 1625921736 in words is "one billion, six hundred twenty-five million, nine hundred twenty-one thousand, seven hundred thirty-six".