64364520402 has 128 divisors (see below), whose sum is σ = 177207582720. Its totient is φ = 16862644800.

The previous prime is 64364520281. The next prime is 64364520419. The reversal of 64364520402 is 20402546346.

64364520402 is a `hidden beast` number, since 6 + 4 + 3 + 645 + 2 + 0 + 4 + 0 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 698643 + ... + 785385.

It is an arithmetic number, because the mean of its divisors is an integer number (1384434240).

Almost surely, 2^64364520402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64364520402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88603791360).

64364520402 is an abundant number, since it is smaller than the sum of its proper divisors (112843062318).

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

64364520402 is a wasteful number, since it uses less digits than its factorization.

64364520402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86925 (or 86919 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 64364520402 in words is "sixty-four billion, three hundred sixty-four million, five hundred twenty thousand, four hundred two".