646101664472 has 32 divisors (see below), whose sum is σ = 1352305817280. Its totient is φ = 286852745760.

The previous prime is 646101664469. The next prime is 646101664493. The reversal of 646101664472 is 274466101646.

It is a congruent number.

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, 85369058 + ... + 85376625.

It is an arithmetic number, because the mean of its divisors is an integer number (42259556790).

Almost surely, 2^646101664472 is an apocalyptic number.

It is an amenable number.

646101664472 is an abundant number, since it is smaller than the sum of its proper divisors (706204152808).

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

646101664472 is a wasteful number, since it uses less digits than its factorization.

646101664472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170745743 (or 170745739 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 646101664472 in words is "six hundred forty-six billion, one hundred one million, six hundred sixty-four thousand, four hundred seventy-two".