620625064 has 16 divisors (see below), whose sum is σ = 1163960820. Its totient is φ = 310235520.

The previous prime is 620625023. The next prime is 620625067. The reversal of 620625064 is 460526026.

It can be written as a sum of positive squares in 2 ways, for example, as 620508100 + 116964 = 24910^2 + 342^2 .

It is not an unprimeable number, because it can be changed into a prime (620625067) 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, 39172 + ... + 52684.

Almost surely, 2^620625064 is an apocalyptic number.

It is an amenable number.

620625064 is a deficient number, since it is larger than the sum of its proper divisors (543335756).

620625064 is a wasteful number, since it uses less digits than its factorization.

620625064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19260 (or 19256 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 620625064 is about 24912.3476212098. The cubic root of 620625064 is about 852.9883575992.

The spelling of 620625064 in words is "six hundred twenty million, six hundred twenty-five thousand, sixty-four".