64901601798 has 64 divisors (see below), whose sum is σ = 146414960640. Its totient is φ = 19001008800.

The previous prime is 64901601773. The next prime is 64901601803. The reversal of 64901601798 is 89710610946.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 64901601798.

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, 1215793 + ... + 1268051.

It is an arithmetic number, because the mean of its divisors is an integer number (2287733760).

Almost surely, 2^64901601798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64901601798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73207480320).

64901601798 is an abundant number, since it is smaller than the sum of its proper divisors (81513358842).

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

64901601798 is a wasteful number, since it uses less digits than its factorization.

64901601798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52913.

The product of its (nonzero) digits is 653184, while the sum is 51.

The spelling of 64901601798 in words is "sixty-four billion, nine hundred one million, six hundred one thousand, seven hundred ninety-eight".