625404131989 has 8 divisors (see below), whose sum is σ = 769728162560. Its totient is φ = 494825247216.

The previous prime is 625404131959. The next prime is 625404131999. The reversal of 625404131989 is 989131404526.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 625404131989 - 2³¹ = 623256648341 is a prime.

It is a super-2 number, since 2×625404131989² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625404131939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3436286349 + ... + 3436286530.

It is an arithmetic number, because the mean of its divisors is an integer number (96216020320).

Almost surely, 2^625404131989 is an apocalyptic number.

It is an amenable number.

625404131989 is a deficient number, since it is larger than the sum of its proper divisors (144324030571).

625404131989 is a wasteful number, since it uses less digits than its factorization.

625404131989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6872572899.

The product of its (nonzero) digits is 1866240, while the sum is 52.

The spelling of 625404131989 in words is "six hundred twenty-five billion, four hundred four million, one hundred thirty-one thousand, nine hundred eighty-nine".