64956612672 has 336 divisors, whose sum is σ = 237163904640. Its totient is φ = 16547659776.

The previous prime is 64956612659. The next prime is 64956612727. The reversal of 64956612672 is 27621665946.

64956612672 is a `hidden beast` number, since 6 + 4 + 9 + 566 + 1 + 2 + 6 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (336).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1277398 + ... + 1327274.

Almost surely, 2^64956612672 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 64956612672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118581952320).

64956612672 is an abundant number, since it is smaller than the sum of its proper divisors (172207291968).

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

64956612672 is a wasteful number, since it uses less digits than its factorization.

64956612672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49938 (or 49925 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 64956612672 in words is "sixty-four billion, nine hundred fifty-six million, six hundred twelve thousand, six hundred seventy-two".