6426640640624 has 30 divisors (see below), whose sum is σ = 13016528904456. Its totient is φ = 3073610737120.

The previous prime is 6426640640611. The next prime is 6426640640663. The reversal of 6426640640624 is 4260460466246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 379637132 + ... + 379654059.

Almost surely, 2^{6426640640624} is an apocalyptic number.

It is an amenable number.

6426640640624 is an abundant number, since it is smaller than the sum of its proper divisors (6589888263832).

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

6426640640624 is a wasteful number, since it uses less digits than its factorization.

6426640640624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759291245 (or 759291216 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 50.

The spelling of 6426640640624 in words is "six trillion, four hundred twenty-six billion, six hundred forty million, six hundred forty thousand, six hundred twenty-four".