1625481808 has 20 divisors (see below), whose sum is σ = 3168234720. Its totient is φ = 807872864.

The previous prime is 1625481797. The next prime is 1625481827. The reversal of 1625481808 is 8081845261.

It is a super-2 number, since 2×1625481808² = 5284382216277897728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301498 + ... + 306841.

It is an arithmetic number, because the mean of its divisors is an integer number (158411736).

Almost surely, 2^1625481808 is an apocalyptic number.

It is an amenable number.

1625481808 is a deficient number, since it is larger than the sum of its proper divisors (1542752912).

1625481808 is a wasteful number, since it uses less digits than its factorization.

1625481808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608514 (or 608508 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 1625481808 is about 40317.2643913250. The cubic root of 1625481808 is about 1175.7835264158.

The spelling of 1625481808 in words is "one billion, six hundred twenty-five million, four hundred eighty-one thousand, eight hundred eight".