64185702416 has 80 divisors (see below), whose sum is σ = 142900258560. Its totient is φ = 27621440640.

The previous prime is 64185702403. The next prime is 64185702431. The reversal of 64185702416 is 61420758146.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5836475 + ... + 5847461.

It is an arithmetic number, because the mean of its divisors is an integer number (1786253232).

Almost surely, 2^64185702416 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 64185702416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71450129280).

64185702416 is an abundant number, since it is smaller than the sum of its proper divisors (78714556144).

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

64185702416 is a wasteful number, since it uses less digits than its factorization.

64185702416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12772 (or 12766 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 64185702416 in words is "sixty-four billion, one hundred eighty-five million, seven hundred two thousand, four hundred sixteen".