64251946375 has 32 divisors (see below), whose sum is σ = 82128743424. Its totient is φ = 50166688000.

The previous prime is 64251946351. The next prime is 64251946393. The reversal of 64251946375 is 57364915246.

It is not a de Polignac number, because 64251946375 - 2²³ = 64243557767 is a prime.

It is a super-2 number, since 2×64251946375² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1239987 + ... + 1290763.

It is an arithmetic number, because the mean of its divisors is an integer number (2566523232).

Almost surely, 2^64251946375 is an apocalyptic number.

64251946375 is a deficient number, since it is larger than the sum of its proper divisors (17876797049).

64251946375 is a wasteful number, since it uses less digits than its factorization.

64251946375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51036 (or 51026 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 52.

The spelling of 64251946375 in words is "sixty-four billion, two hundred fifty-one million, nine hundred forty-six thousand, three hundred seventy-five".