64344886272 has 220 divisors, whose sum is σ = 196625829576. Its totient is φ = 20948336640.

The previous prime is 64344886267. The next prime is 64344886367. The reversal of 64344886272 is 27268844346.

64344886272 is a `hidden beast` number, since 6 + 4 + 3 + 4 + 4 + 8 + 8 + 627 + 2 = 666.

It is a super-2 number, since 2×64344886272² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3557572 + ... + 3575612.

Almost surely, 2^64344886272 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 64344886272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98312914788).

64344886272 is an abundant number, since it is smaller than the sum of its proper divisors (132280943304).

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

64344886272 is a wasteful number, since it uses less digits than its factorization.

64344886272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18116 (or 18089 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 54.

The spelling of 64344886272 in words is "sixty-four billion, three hundred forty-four million, eight hundred eighty-six thousand, two hundred seventy-two".