64372430521 has 64 divisors (see below), whose sum is σ = 83955916800. Its totient is φ = 48086438400.

The previous prime is 64372430519. The next prime is 64372430539. The reversal of 64372430521 is 12503427346.

It is not a de Polignac number, because 64372430521 - 2¹ = 64372430519 is a prime.

It is a super-2 number, since 2×64372430521² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64372430501) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 8901135 + ... + 8908363.

It is an arithmetic number, because the mean of its divisors is an integer number (1311811200).

Almost surely, 2^64372430521 is an apocalyptic number.

It is an amenable number.

64372430521 is a deficient number, since it is larger than the sum of its proper divisors (19583486279).

64372430521 is a wasteful number, since it uses less digits than its factorization.

64372430521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7390.

The product of its (nonzero) digits is 120960, while the sum is 37.

Adding to 64372430521 its reverse (12503427346), we get a palindrome (76875857867).

The spelling of 64372430521 in words is "sixty-four billion, three hundred seventy-two million, four hundred thirty thousand, five hundred twenty-one".