64213725056 has 128 divisors (see below), whose sum is σ = 142538961600. Its totient is φ = 28624896000.

The previous prime is 64213724959. The next prime is 64213725089. The reversal of 64213725056 is 65052731246.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6885965 + ... + 6895283.

Almost surely, 2^64213725056 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 64213725056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71269480800).

64213725056 is an abundant number, since it is smaller than the sum of its proper divisors (78325236544).

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

64213725056 is a wasteful number, since it uses less digits than its factorization.

64213725056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9488 (or 9476 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 64213725056 in words is "sixty-four billion, two hundred thirteen million, seven hundred twenty-five thousand, fifty-six".