64839107472 has 80 divisors (see below), whose sum is σ = 172979785728. Its totient is φ = 20906709120.

The previous prime is 64839107471. The next prime is 64839107477. The reversal of 64839107472 is 27470193846.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (64839107471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3954363 + ... + 3970725.

Almost surely, 2^64839107472 is an apocalyptic number.

64839107472 is a gapful number since it is divisible by the number (62) 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 64839107472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86489892864).

64839107472 is an abundant number, since it is smaller than the sum of its proper divisors (108140678256).

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

64839107472 is a wasteful number, since it uses less digits than its factorization.

64839107472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19068 (or 19062 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 51.

The spelling of 64839107472 in words is "sixty-four billion, eight hundred thirty-nine million, one hundred seven thousand, four hundred seventy-two".