63844164564 has 48 divisors (see below), whose sum is σ = 163171713600. Its totient is φ = 19338866176.

The previous prime is 63844164563. The next prime is 63844164577. The reversal of 63844164564 is 46546144836.

It is a super-2 number, since 2×63844164564² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63844164563) 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, 5389974 + ... + 5401805.

It is an arithmetic number, because the mean of its divisors is an integer number (3399410700).

Almost surely, 2^63844164564 is an apocalyptic number.

It is an amenable number.

63844164564 is an abundant number, since it is smaller than the sum of its proper divisors (99327549036).

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

63844164564 is a wasteful number, since it uses less digits than its factorization.

63844164564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10791832 (or 10791830 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 51.

The spelling of 63844164564 in words is "sixty-three billion, eight hundred forty-four million, one hundred sixty-four thousand, five hundred sixty-four".