64381956324 has 72 divisors (see below), whose sum is σ = 174829108608. Its totient is φ = 18386625600.

The previous prime is 64381956277. The next prime is 64381956337. The reversal of 64381956324 is 42365918346.

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, 1359102 + ... + 1405674.

It is an arithmetic number, because the mean of its divisors is an integer number (2428182064).

Almost surely, 2^64381956324 is an apocalyptic number.

It is an amenable number.

64381956324 is an abundant number, since it is smaller than the sum of its proper divisors (110447152284).

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

64381956324 is a wasteful number, since it uses less digits than its factorization.

64381956324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48945 (or 48936 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 51.

The spelling of 64381956324 in words is "sixty-four billion, three hundred eighty-one million, nine hundred fifty-six thousand, three hundred twenty-four".