64020800000 has 120 divisors (see below), whose sum is σ = 159889461732. Its totient is φ = 25607680000.

The previous prime is 64020799979. The next prime is 64020800033. The reversal of 64020800000 is 802046.

It can be written as a sum of positive squares in 6 ways, for example, as 9249822976 + 54770977024 = 96176^2 + 234032^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1579994 + ... + 1620006.

Almost surely, 2^64020800000 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 64020800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79944730866).

64020800000 is an abundant number, since it is smaller than the sum of its proper divisors (95868661732).

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

64020800000 is an frugal number, since it uses more digits than its factorization.

64020800000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40056 (or 40020 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The spelling of 64020800000 in words is "sixty-four billion, twenty million, eight hundred thousand".