646114636644 has 24 divisors (see below), whose sum is σ = 1596283220448. Its totient is φ = 202702631040.

The previous prime is 646114636637. The next prime is 646114636679. The reversal of 646114636644 is 446636411646.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1583614102 + ... + 1583614509.

It is an arithmetic number, because the mean of its divisors is an integer number (66511800852).

Almost surely, 2^646114636644 is an apocalyptic number.

It is an amenable number.

646114636644 is an abundant number, since it is smaller than the sum of its proper divisors (950168583804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646114636644 is a wasteful number, since it uses less digits than its factorization.

646114636644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3167228635 (or 3167228633 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 51.

The spelling of 646114636644 in words is "six hundred forty-six billion, one hundred fourteen million, six hundred thirty-six thousand, six hundred forty-four".