64009311520 has 576 divisors, whose sum is σ = 201633328512. Its totient is φ = 18966528000.

The previous prime is 64009311517. The next prime is 64009311521. The reversal of 64009311520 is 2511390046.

It is a super-2 number, since 2×64009311520² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64009311521) 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, 152040910 + ... + 152041330.

It is an arithmetic number, because the mean of its divisors is an integer number (350057862).

Almost surely, 2^64009311520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64009311520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100816664256).

64009311520 is an abundant number, since it is smaller than the sum of its proper divisors (137624016992).

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

64009311520 is a wasteful number, since it uses less digits than its factorization.

64009311520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 64009311520 in words is "sixty-four billion, nine million, three hundred eleven thousand, five hundred twenty".