64714256816 has 160 divisors (see below), whose sum is σ = 144285247296. Its totient is φ = 27855360000.

The previous prime is 64714256773. The next prime is 64714256833. The reversal of 64714256816 is 61865241746.

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, 40119626 + ... + 40121238.

Almost surely, 2^64714256816 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 64714256816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72142623648).

64714256816 is an abundant number, since it is smaller than the sum of its proper divisors (79570990480).

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

64714256816 is a wasteful number, since it uses less digits than its factorization.

64714256816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831 (or 1825 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 50.

The spelling of 64714256816 in words is "sixty-four billion, seven hundred fourteen million, two hundred fifty-six thousand, eight hundred sixteen".