64931530244 has 48 divisors (see below), whose sum is σ = 130201489152. Its totient is φ = 27755384832.

The previous prime is 64931530201. The next prime is 64931530247. The reversal of 64931530244 is 44203513946.

It is a super-2 number, since 2×64931530244² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64931530247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32191124 + ... + 32193140.

It is an arithmetic number, because the mean of its divisors is an integer number (2712531024).

Almost surely, 2^64931530244 is an apocalyptic number.

It is an amenable number.

64931530244 is an abundant number, since it is smaller than the sum of its proper divisors (65269958908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64931530244 is a wasteful number, since it uses less digits than its factorization.

64931530244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452 (or 4450 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 64931530244 in words is "sixty-four billion, nine hundred thirty-one million, five hundred thirty thousand, two hundred forty-four".