6641642646512 has 10 divisors (see below), whose sum is σ = 12868182627648. Its totient is φ = 3320821323248.

The previous prime is 6641642646391. The next prime is 6641642646557. The reversal of 6641642646512 is 2156462461466.

It is a happy number.

It is a super-2 number, since 2×6641642646512² (a number of 26 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, 207551332688 + ... + 207551332719.

Almost surely, 2^{6641642646512} is an apocalyptic number.

It is an amenable number.

6641642646512 is a deficient number, since it is larger than the sum of its proper divisors (6226539981136).

6641642646512 is a wasteful number, since it uses less digits than its factorization.

6641642646512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415102665415 (or 415102665409 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 53.

The spelling of 6641642646512 in words is "six trillion, six hundred forty-one billion, six hundred forty-two million, six hundred forty-six thousand, five hundred twelve".