625881992 has 8 divisors (see below), whose sum is σ = 1173528750. Its totient is φ = 312940992.

The previous prime is 625881941. The next prime is 625882007. The reversal of 625881992 is 299188526.

It can be written as a sum of positive squares in only one way, i.e., 515925796 + 109956196 = 22714^2 + 10486^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 625881992.

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 as a sum of consecutive naturals, namely, 39117617 + ... + 39117632.

Almost surely, 2^625881992 is an apocalyptic number.

It is an amenable number.

625881992 is a deficient number, since it is larger than the sum of its proper divisors (547646758).

625881992 is a wasteful number, since it uses less digits than its factorization.

625881992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78235255 (or 78235251 counting only the distinct ones).

The product of its digits is 622080, while the sum is 50.

The square root of 625881992 is about 25017.6336211081. The cubic root of 625881992 is about 855.3899669962.

The spelling of 625881992 in words is "six hundred twenty-five million, eight hundred eighty-one thousand, nine hundred ninety-two".