64451263131 has 24 divisors (see below), whose sum is σ = 93495189216. Its totient is φ = 42783552000.

The previous prime is 64451263111. The next prime is 64451263171. The reversal of 64451263131 is 13136215446.

64451263131 is a `hidden beast` number, since 6 + 4 + 4 + 5 + 12 + 631 + 3 + 1 = 666.

It is not a de Polignac number, because 64451263131 - 2⁹ = 64451262619 is a prime.

It is a super-2 number, since 2×64451263131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64451263111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6132381 + ... + 6142881.

It is an arithmetic number, because the mean of its divisors is an integer number (3895632884).

Almost surely, 2^64451263131 is an apocalyptic number.

64451263131 is a deficient number, since it is larger than the sum of its proper divisors (29043926085).

64451263131 is a wasteful number, since it uses less digits than its factorization.

64451263131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13363 (or 13360 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

Adding to 64451263131 its reverse (13136215446), we get a palindrome (77587478577).

The spelling of 64451263131 in words is "sixty-four billion, four hundred fifty-one million, two hundred sixty-three thousand, one hundred thirty-one".