64843578752 has 16 divisors (see below), whose sum is σ = 129180567300. Its totient is φ = 32421789312.

The previous prime is 64843578743. The next prime is 64843578763. The reversal of 64843578752 is 25787534846.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 64843578691 and 64843578700.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253295102 + ... + 253295357.

Almost surely, 2^64843578752 is an apocalyptic number.

It is an amenable number.

64843578752 is a deficient number, since it is larger than the sum of its proper divisors (64336988548).

64843578752 is an equidigital number, since it uses as much as digits as its factorization.

64843578752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506590473 (or 506590461 counting only the distinct ones).

The product of its digits is 45158400, while the sum is 59.

The spelling of 64843578752 in words is "sixty-four billion, eight hundred forty-three million, five hundred seventy-eight thousand, seven hundred fifty-two".