64757326387 has 4 divisors (see below), whose sum is σ = 69738659200. Its totient is φ = 59775993576.

The previous prime is 64757326363. The next prime is 64757326429. The reversal of 64757326387 is 78362375746.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64757326387 - 2¹¹ = 64757324339 is a prime.

It is a super-2 number, since 2×64757326387² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64757326357) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2490666387 + ... + 2490666412.

It is an arithmetic number, because the mean of its divisors is an integer number (17434664800).

Almost surely, 2^64757326387 is an apocalyptic number.

64757326387 is a deficient number, since it is larger than the sum of its proper divisors (4981332813).

64757326387 is a wasteful number, since it uses less digits than its factorization.

64757326387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4981332812.

The product of its digits is 35562240, while the sum is 58.

The spelling of 64757326387 in words is "sixty-four billion, seven hundred fifty-seven million, three hundred twenty-six thousand, three hundred eighty-seven".