64370921472 has 312 divisors, whose sum is σ = 218462226528. Its totient is φ = 18004377600.

The previous prime is 64370921467. The next prime is 64370921477. The reversal of 64370921472 is 27412907346.

64370921472 is a `hidden beast` number, since 64 + 37 + 0 + 92 + 1 + 472 = 666.

It is an interprime number because it is at equal distance from previous prime (64370921467) and next prime (64370921477).

It is a tau number, because it is divible by the number of its divisors (312).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64370921477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5265447 + ... + 5277657.

It is an arithmetic number, because the mean of its divisors is an integer number (700199444).

Almost surely, 2^64370921472 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 64370921472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109231113264).

64370921472 is an abundant number, since it is smaller than the sum of its proper divisors (154091305056).

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

64370921472 is a wasteful number, since it uses less digits than its factorization.

64370921472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12265 (or 12240 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 45.

The spelling of 64370921472 in words is "sixty-four billion, three hundred seventy million, nine hundred twenty-one thousand, four hundred seventy-two".