64273470912 has 504 divisors, whose sum is σ = 223078761360. Its totient is φ = 17627258880.

The previous prime is 64273470889. The next prime is 64273470931. The reversal of 64273470912 is 21907437246.

It is a tau number, because it is divible by the number of its divisors (504).

It is a super-2 number, since 2×64273470912² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 77530914 + ... + 77531742.

It is an arithmetic number, because the mean of its divisors is an integer number (442616590).

Almost surely, 2^64273470912 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 64273470912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111539380680).

64273470912 is an abundant number, since it is smaller than the sum of its proper divisors (158805290448).

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

64273470912 is a wasteful number, since it uses less digits than its factorization.

64273470912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 949 counting only the distinct ones).

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

The spelling of 64273470912 in words is "sixty-four billion, two hundred seventy-three million, four hundred seventy thousand, nine hundred twelve".