64352993832 has 128 divisors (see below), whose sum is σ = 181853539200. Its totient is φ = 21080217600.

The previous prime is 64352993813. The next prime is 64352993839. The reversal of 64352993832 is 23839925346.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64352993839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27418083 + ... + 27420429.

It is an arithmetic number, because the mean of its divisors is an integer number (1420730775).

Almost surely, 2^64352993832 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 64352993832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90926769600).

64352993832 is an abundant number, since it is smaller than the sum of its proper divisors (117500545368).

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

64352993832 is a wasteful number, since it uses less digits than its factorization.

64352993832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504 (or 4494 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The spelling of 64352993832 in words is "sixty-four billion, three hundred fifty-two million, nine hundred ninety-three thousand, eight hundred thirty-two".