64257330720 has 576 divisors, whose sum is σ = 232820904960. Its totient is φ = 14868480000.

The previous prime is 64257330691. The next prime is 64257330721. The reversal of 64257330720 is 2703375246.

It is not an unprimeable number, because it can be changed into a prime (64257330721) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 160242520 + ... + 160242920.

It is an arithmetic number, because the mean of its divisors is an integer number (404202960).

Almost surely, 2^64257330720 is an apocalyptic number.

64257330720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64257330720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116410452480).

64257330720 is an abundant number, since it is smaller than the sum of its proper divisors (168563574240).

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

64257330720 is a wasteful number, since it uses less digits than its factorization.

64257330720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 39.

The spelling of 64257330720 in words is "sixty-four billion, two hundred fifty-seven million, three hundred thirty thousand, seven hundred twenty".