64353972912 has 80 divisors (see below), whose sum is σ = 169724636928. Its totient is φ = 21004322560.

The previous prime is 64353972911. The next prime is 64353972913. The reversal of 64353972912 is 21927935346.

It is an interprime number because it is at equal distance from previous prime (64353972911) and next prime (64353972913).

It is not an unprimeable number, because it can be changed into a prime (64353972911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1254487 + ... + 1304777.

Almost surely, 2^64353972912 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 64353972912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84862318464).

64353972912 is an abundant number, since it is smaller than the sum of its proper divisors (105370664016).

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

64353972912 is a wasteful number, since it uses less digits than its factorization.

64353972912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50858 (or 50852 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The spelling of 64353972912 in words is "sixty-four billion, three hundred fifty-three million, nine hundred seventy-two thousand, nine hundred twelve".