646062624664 has 8 divisors (see below), whose sum is σ = 1211367421260. Its totient is φ = 323031312328.

The previous prime is 646062624607. The next prime is 646062624731. The reversal of 646062624664 is 466426260646.

646062624664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×646062624664² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40378914034 + ... + 40378914049.

Almost surely, 2^646062624664 is an apocalyptic number.

It is an amenable number.

646062624664 is a deficient number, since it is larger than the sum of its proper divisors (565304796596).

646062624664 is a wasteful number, since it uses less digits than its factorization.

646062624664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80757828089 (or 80757828085 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 52.

The spelling of 646062624664 in words is "six hundred forty-six billion, sixty-two million, six hundred twenty-four thousand, six hundred sixty-four".