64272718328 has 64 divisors (see below), whose sum is σ = 153436248000. Its totient is φ = 24549783552.

The previous prime is 64272718309. The next prime is 64272718337. The reversal of 64272718328 is 82381727246.

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, 1501073 + ... + 1543296.

It is an arithmetic number, because the mean of its divisors is an integer number (2397441375).

Almost surely, 2^64272718328 is an apocalyptic number.

It is an amenable number.

64272718328 is an abundant number, since it is smaller than the sum of its proper divisors (89163529672).

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

64272718328 is a wasteful number, since it uses less digits than its factorization.

64272718328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044424 (or 3044420 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 50.

The spelling of 64272718328 in words is "sixty-four billion, two hundred seventy-two million, seven hundred eighteen thousand, three hundred twenty-eight".