625618879 has 4 divisors (see below), whose sum is σ = 625675480. Its totient is φ = 625562280.

The previous prime is 625618841. The next prime is 625618969. The reversal of 625618879 is 978816526.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 625618879 - 2²⁷ = 491401151 is a prime.

It is a super-2 number, since 2×625618879² = 782797963522433282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625618079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5709 + ... + 35830.

It is an arithmetic number, because the mean of its divisors is an integer number (156418870).

Almost surely, 2^625618879 is an apocalyptic number.

625618879 is a deficient number, since it is larger than the sum of its proper divisors (56601).

625618879 is a wasteful number, since it uses less digits than its factorization.

625618879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56600.

The product of its digits is 1451520, while the sum is 52.

The square root of 625618879 is about 25012.3745174264. The cubic root of 625618879 is about 855.2700850969.

The spelling of 625618879 in words is "six hundred twenty-five million, six hundred eighteen thousand, eight hundred seventy-nine".