64757326385 has 16 divisors (see below), whose sum is σ = 81297844992. Its totient is φ = 49466928000.

The previous prime is 64757326363. The next prime is 64757326429. The reversal of 64757326385 is 58362375746.

64757326385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64757326385 - 2²⁰ = 64756277809 is a prime.

It is a super-2 number, since 2×64757326385² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64757326385.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3350891 + ... + 3370160.

It is an arithmetic number, because the mean of its divisors is an integer number (5081115312).

Almost surely, 2^64757326385 is an apocalyptic number.

It is an amenable number.

64757326385 is a deficient number, since it is larger than the sum of its proper divisors (16540518607).

64757326385 is a wasteful number, since it uses less digits than its factorization.

64757326385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6721144.

The product of its digits is 25401600, while the sum is 56.

The spelling of 64757326385 in words is "sixty-four billion, seven hundred fifty-seven million, three hundred twenty-six thousand, three hundred eighty-five".