64381381882 has 4 divisors (see below), whose sum is σ = 96572072826. Its totient is φ = 32190690940.

The previous prime is 64381381873. The next prime is 64381381903. The reversal of 64381381882 is 28818318346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33749731521 + 30631650361 = 183711^2 + 175019^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16095345469 + ... + 16095345472.

Almost surely, 2^64381381882 is an apocalyptic number.

64381381882 is a deficient number, since it is larger than the sum of its proper divisors (32190690944).

64381381882 is a wasteful number, since it uses less digits than its factorization.

64381381882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32190690943.

The product of its digits is 1769472, while the sum is 52.

The spelling of 64381381882 in words is "sixty-four billion, three hundred eighty-one million, three hundred eighty-one thousand, eight hundred eighty-two".