625639845 has 24 divisors (see below), whose sum is σ = 1028843424. Its totient is φ = 324645696.

The previous prime is 625639793. The next prime is 625639849. The reversal of 625639845 is 548936526.

It is not a de Polignac number, because 625639845 - 2⁸ = 625639589 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 625639794 and 625639803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625639849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5302 + ... + 35768.

It is an arithmetic number, because the mean of its divisors is an integer number (42868476).

Almost surely, 2^625639845 is an apocalyptic number.

It is an amenable number.

625639845 is a deficient number, since it is larger than the sum of its proper divisors (403203579).

625639845 is a wasteful number, since it uses less digits than its factorization.

625639845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30549 (or 30512 counting only the distinct ones).

The product of its digits is 1555200, while the sum is 48.

The square root of 625639845 is about 25012.7936264624. The cubic root of 625639845 is about 855.2796390458.

The spelling of 625639845 in words is "six hundred twenty-five million, six hundred thirty-nine thousand, eight hundred forty-five".