625755657 has 4 divisors (see below), whose sum is σ = 834340880. Its totient is φ = 417170436.

The previous prime is 625755643. The next prime is 625755673. The reversal of 625755657 is 756557526.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 625755657 - 2⁸ = 625755401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625755607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104292607 + ... + 104292612.

It is an arithmetic number, because the mean of its divisors is an integer number (208585220).

Almost surely, 2^625755657 is an apocalyptic number.

It is an amenable number.

625755657 is a deficient number, since it is larger than the sum of its proper divisors (208585223).

625755657 is a wasteful number, since it uses less digits than its factorization.

625755657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208585222.

The product of its digits is 2205000, while the sum is 48.

The square root of 625755657 is about 25015.1085746195. The cubic root of 625755657 is about 855.3324093071.

The spelling of 625755657 in words is "six hundred twenty-five million, seven hundred fifty-five thousand, six hundred fifty-seven".