64655679216 has 80 divisors (see below), whose sum is σ = 176989127328. Its totient is φ = 20268441600.

The previous prime is 64655679211. The next prime is 64655679259. The reversal of 64655679216 is 61297655646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64655679211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1047946 + ... + 1107926.

Almost surely, 2^64655679216 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 64655679216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88494563664).

64655679216 is an abundant number, since it is smaller than the sum of its proper divisors (112333448112).

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

64655679216 is a wasteful number, since it uses less digits than its factorization.

64655679216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61330 (or 61324 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 57.

The spelling of 64655679216 in words is "sixty-four billion, six hundred fifty-five million, six hundred seventy-nine thousand, two hundred sixteen".