64562973888 has 168 divisors, whose sum is σ = 201971690544. Its totient is φ = 18144000000.

The previous prime is 64562973869. The next prime is 64562973901. The reversal of 64562973888 is 88837926546.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 517638 + ... + 630138.

Almost surely, 2^64562973888 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 64562973888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100985845272).

64562973888 is an abundant number, since it is smaller than the sum of its proper divisors (137408716656).

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

64562973888 is a wasteful number, since it uses less digits than its factorization.

64562973888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112591 (or 112574 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 66.

The spelling of 64562973888 in words is "sixty-four billion, five hundred sixty-two million, nine hundred seventy-three thousand, eight hundred eighty-eight".