646870248452592 has 240 divisors, whose sum is σ = 1888314848364672. Its totient is φ = 214371559584000.

The previous prime is 646870248452579. The next prime is 646870248452657. The reversal of 646870248452592 is 295254842078646.

It is a happy number.

646870248452592 is a `hidden beast` number, since 6 + 4 + 6 + 8 + 7 + 0 + 2 + 4 + 8 + 4 + 525 + 92 = 666.

It is a super-2 number, since 2×646870248452592² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 646870248452592.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 533204838 + ... + 534416634.

Almost surely, 2^{646870248452592} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 646870248452592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (944157424182336).

646870248452592 is an abundant number, since it is smaller than the sum of its proper divisors (1241444599912080).

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

646870248452592 is a wasteful number, since it uses less digits than its factorization.

646870248452592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1212618 (or 1212600 counting only the distinct ones).

The product of its (nonzero) digits is 1857945600, while the sum is 72.

The spelling of 646870248452592 in words is "six hundred forty-six trillion, eight hundred seventy billion, two hundred forty-eight million, four hundred fifty-two thousand, five hundred ninety-two".