64014521659728 has 160 divisors (see below), whose sum is σ = 175072808908800. Its totient is φ = 20099221659648.

The previous prime is 64014521659691. The next prime is 64014521659789. The reversal of 64014521659728 is 82795612541046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1285226601 + ... + 1285276407.

It is an arithmetic number, because the mean of its divisors is an integer number (1094205055680).

Almost surely, 2^{64014521659728} 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 64014521659728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87536404454400).

64014521659728 is an abundant number, since it is smaller than the sum of its proper divisors (111058287249072).

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

64014521659728 is a wasteful number, since it uses less digits than its factorization.

64014521659728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57889 (or 57883 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 60.

The spelling of 64014521659728 in words is "sixty-four trillion, fourteen billion, five hundred twenty-one million, six hundred fifty-nine thousand, seven hundred twenty-eight".