64339396416 has 280 divisors, whose sum is σ = 195598060416. Its totient is φ = 20902164480.

The previous prime is 64339396391. The next prime is 64339396453. The reversal of 64339396416 is 61469393346.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 84545476 + ... + 84546236.

Almost surely, 2^64339396416 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 64339396416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97799030208).

64339396416 is an abundant number, since it is smaller than the sum of its proper divisors (131258664000).

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

64339396416 is a wasteful number, since it uses less digits than its factorization.

64339396416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1160 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 54.

The spelling of 64339396416 in words is "sixty-four billion, three hundred thirty-nine million, three hundred ninety-six thousand, four hundred sixteen".