625645456 has 20 divisors (see below), whose sum is σ = 1212945804. Its totient is φ = 312627200.

The previous prime is 625645439. The next prime is 625645459. The reversal of 625645456 is 654546526.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 357210000 + 268435456 = 18900^2 + 16384^2 .

It is a super-2 number, since 2×625645456² = 782864473226895872, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (625645459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16176 + ... + 38896.

Almost surely, 2^625645456 is an apocalyptic number.

It is an amenable number.

625645456 is a deficient number, since it is larger than the sum of its proper divisors (587300348).

625645456 is a wasteful number, since it uses less digits than its factorization.

625645456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24450 (or 24444 counting only the distinct ones).

The product of its digits is 864000, while the sum is 43.

The square root of 625645456 is about 25012.9057888123. The cubic root of 625645456 is about 855.2821958734.

The spelling of 625645456 in words is "six hundred twenty-five million, six hundred forty-five thousand, four hundred fifty-six".