64632450880 has 56 divisors (see below), whose sum is σ = 160597608192. Its totient is φ = 24728934912.

The previous prime is 64632450877. The next prime is 64632450893. The reversal of 64632450880 is 8805423646.

It is a super-2 number, since 2×64632450880² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 64632450880.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4383432 + ... + 4398151.

It is an arithmetic number, because the mean of its divisors is an integer number (2867814432).

Almost surely, 2^64632450880 is an apocalyptic number.

It is an amenable number.

64632450880 is an abundant number, since it is smaller than the sum of its proper divisors (95965157312).

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

64632450880 is a wasteful number, since it uses less digits than its factorization.

64632450880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8781623 (or 8781613 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 64632450880 in words is "sixty-four billion, six hundred thirty-two million, four hundred fifty thousand, eight hundred eighty".