6364173322640 has 80 divisors (see below), whose sum is σ = 16912201621248. Its totient is φ = 2181785000448.

The previous prime is 6364173322589. The next prime is 6364173322649. The reversal of 6364173322640 is 462233714636.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (6364173322649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5113709 + ... + 6235251.

Almost surely, 2^{6364173322640} is an apocalyptic number.

It is an amenable number.

6364173322640 is an abundant number, since it is smaller than the sum of its proper divisors (10548028298608).

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

6364173322640 is a wasteful number, since it uses less digits than its factorization.

6364173322640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131696 (or 1131690 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 47.

The spelling of 6364173322640 in words is "six trillion, three hundred sixty-four billion, one hundred seventy-three million, three hundred twenty-two thousand, six hundred forty".