646627712044 has 24 divisors (see below), whose sum is σ = 1207933171200. Its totient is φ = 301983287760.

The previous prime is 646627712041. The next prime is 646627712083. The reversal of 646627712044 is 440217726646.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (646627712041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59911924 + ... + 59922715.

It is an arithmetic number, because the mean of its divisors is an integer number (50330548800).

Almost surely, 2^646627712044 is an apocalyptic number.

It is an amenable number.

646627712044 is a deficient number, since it is larger than the sum of its proper divisors (561305459156).

646627712044 is a wasteful number, since it uses less digits than its factorization.

646627712044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119834733 (or 119834731 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 49.

The spelling of 646627712044 in words is "six hundred forty-six billion, six hundred twenty-seven million, seven hundred twelve thousand, forty-four".