1625531916 has 12 divisors (see below), whose sum is σ = 3792907832. Its totient is φ = 541843968.

The previous prime is 1625531893. The next prime is 1625531927. The reversal of 1625531916 is 6191355261.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 67730485 + ... + 67730508.

Almost surely, 2^1625531916 is an apocalyptic number.

It is an amenable number.

1625531916 is an abundant number, since it is smaller than the sum of its proper divisors (2167375916).

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

1625531916 is a wasteful number, since it uses less digits than its factorization.

1625531916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135461000 (or 135460998 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 1625531916 is about 40317.8858076661. The cubic root of 1625531916 is about 1175.7956080758.

The spelling of 1625531916 in words is "one billion, six hundred twenty-five million, five hundred thirty-one thousand, nine hundred sixteen".