64970918686116 has 135 divisors (see below), whose sum is σ = 170362310552049. Its totient is φ = 21591441404352.

The previous prime is 64970918686103. The next prime is 64970918686127. The reversal of 64970918686116 is 61168681907946.

The square root of 64970918686116 is 8060454.

It is a perfect power (a square), and thus also a powerful number.

64970918686116 is a `hidden beast` number, since 6 + 497 + 0 + 9 + 1 + 8 + 68 + 61 + 16 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10708248343716 + 54262670342400 = 3272346^2 + 7366320^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 82555169475 + ... + 82555170261.

Almost surely, 2^{64970918686116} is an apocalyptic number.

64970918686116 is the 8060454-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64970918686116

64970918686116 is an abundant number, since it is smaller than the sum of its proper divisors (105391391865933).

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

64970918686116 is an frugal number, since it uses more digits than its factorization.

64970918686116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2728 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 188116992, while the sum is 72.

The spelling of 64970918686116 in words is "sixty-four trillion, nine hundred seventy billion, nine hundred eighteen million, six hundred eighty-six thousand, one hundred sixteen".