646983401496 has 16 divisors (see below), whose sum is σ = 1617458503800. Its totient is φ = 215661133824.

The previous prime is 646983401479. The next prime is 646983401497. The reversal of 646983401496 is 694104389646.

It is a happy number.

It is a super-2 number, since 2×646983401496² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646983401497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13478820841 + ... + 13478820888.

Almost surely, 2^646983401496 is an apocalyptic number.

It is an amenable number.

646983401496 is an abundant number, since it is smaller than the sum of its proper divisors (970475102304).

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

646983401496 is a wasteful number, since it uses less digits than its factorization.

646983401496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26957641738 (or 26957641734 counting only the distinct ones).

The product of its (nonzero) digits is 26873856, while the sum is 60.

The spelling of 646983401496 in words is "six hundred forty-six billion, nine hundred eighty-three million, four hundred one thousand, four hundred ninety-six".