64573882801638 has 64 divisors (see below), whose sum is σ = 156288614220288. Its totient is φ = 17363409338880.

The previous prime is 64573882801613. The next prime is 64573882801667. The reversal of 64573882801638 is 83610828837546.

It is a Curzon number.

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, 9903256 + ... + 15073892.

It is an arithmetic number, because the mean of its divisors is an integer number (2442009597192).

Almost surely, 2^{64573882801638} is an apocalyptic number.

64573882801638 is an abundant number, since it is smaller than the sum of its proper divisors (91714731418650).

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

64573882801638 is a wasteful number, since it uses less digits than its factorization.

64573882801638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188157.

The product of its (nonzero) digits is 371589120, while the sum is 69.

The spelling of 64573882801638 in words is "sixty-four trillion, five hundred seventy-three billion, eight hundred eighty-two million, eight hundred one thousand, six hundred thirty-eight".