64381986032 has 160 divisors (see below), whose sum is σ = 161023027200. Its totient is φ = 24237480960.

The previous prime is 64381985957. The next prime is 64381986043. The reversal of 64381986032 is 23068918346.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6659282 + ... + 6668942.

It is an arithmetic number, because the mean of its divisors is an integer number (1006393920).

Almost surely, 2^64381986032 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 64381986032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80511513600).

64381986032 is an abundant number, since it is smaller than the sum of its proper divisors (96641041168).

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

64381986032 is a wasteful number, since it uses less digits than its factorization.

64381986032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9911 (or 9905 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 64381986032 in words is "sixty-four billion, three hundred eighty-one million, nine hundred eighty-six thousand, thirty-two".