625623523566 has 16 divisors (see below), whose sum is σ = 1291609855488. Its totient is φ = 201814039800.

The previous prime is 625623523541. The next prime is 625623523643. The reversal of 625623523566 is 665325326526.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681783480 + ... + 1681783851.

It is an arithmetic number, because the mean of its divisors is an integer number (80725615968).

Almost surely, 2^625623523566 is an apocalyptic number.

625623523566 is an abundant number, since it is smaller than the sum of its proper divisors (665986331922).

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

625623523566 is a wasteful number, since it uses less digits than its factorization.

625623523566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3363567367.

The product of its digits is 11664000, while the sum is 51.

The spelling of 625623523566 in words is "six hundred twenty-five billion, six hundred twenty-three million, five hundred twenty-three thousand, five hundred sixty-six".