646422651364 has 24 divisors (see below), whose sum is σ = 1349055969408. Its totient is φ = 264993136320.

The previous prime is 646422651307. The next prime is 646422651367. The reversal of 646422651364 is 463156224646.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (646422651367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501880297 + ... + 501881584.

It is an arithmetic number, because the mean of its divisors is an integer number (56210665392).

Almost surely, 2^646422651364 is an apocalyptic number.

It is an amenable number.

646422651364 is an abundant number, since it is smaller than the sum of its proper divisors (702633318044).

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

646422651364 is a wasteful number, since it uses less digits than its factorization.

646422651364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003761915 (or 1003761913 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 49.

The spelling of 646422651364 in words is "six hundred forty-six billion, four hundred twenty-two million, six hundred fifty-one thousand, three hundred sixty-four".