64856711144 has 32 divisors (see below), whose sum is σ = 124950872640. Its totient is φ = 31542739200.

The previous prime is 64856711141. The next prime is 64856711177. The reversal of 64856711144 is 44111765846.

It is not an unprimeable number, because it can be changed into a prime (64856711141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308252 + ... + 474059.

It is an arithmetic number, because the mean of its divisors is an integer number (3904714770).

Almost surely, 2^64856711144 is an apocalyptic number.

It is an amenable number.

64856711144 is a deficient number, since it is larger than the sum of its proper divisors (60094161496).

64856711144 is a wasteful number, since it uses less digits than its factorization.

64856711144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782601 (or 782597 counting only the distinct ones).

The product of its digits is 645120, while the sum is 47.

The spelling of 64856711144 in words is "sixty-four billion, eight hundred fifty-six million, seven hundred eleven thousand, one hundred forty-four".