625456817816 has 16 divisors (see below), whose sum is σ = 1191956641440. Its totient is φ = 307601713440.

The previous prime is 625456817809. The next prime is 625456817827. The reversal of 625456817816 is 618718654526.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640836416 + ... + 640837391.

It is an arithmetic number, because the mean of its divisors is an integer number (74497290090).

Almost surely, 2^625456817816 is an apocalyptic number.

It is an amenable number.

625456817816 is a deficient number, since it is larger than the sum of its proper divisors (566499823624).

625456817816 is a wasteful number, since it uses less digits than its factorization.

625456817816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281673874 (or 1281673870 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 59.

The spelling of 625456817816 in words is "six hundred twenty-five billion, four hundred fifty-six million, eight hundred seventeen thousand, eight hundred sixteen".