64471218126768 has 200 divisors, whose sum is σ = 196614121954800. Its totient is φ = 20339146469376.

The previous prime is 64471218126751. The next prime is 64471218126779. The reversal of 64471218126768 is 86762181217446.

64471218126768 is a `hidden beast` number, since 6 + 4 + 471 + 2 + 1 + 81 + 26 + 7 + 68 = 666.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23548180 + ... + 26143052.

It is an arithmetic number, because the mean of its divisors is an integer number (983070609774).

Almost surely, 2^{64471218126768} 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 64471218126768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98307060977400).

64471218126768 is an abundant number, since it is smaller than the sum of its proper divisors (132142903828032).

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

64471218126768 is a wasteful number, since it uses less digits than its factorization.

64471218126768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2595921 (or 2595906 counting only the distinct ones).

The product of its digits is 43352064, while the sum is 63.

The spelling of 64471218126768 in words is "sixty-four trillion, four hundred seventy-one billion, two hundred eighteen million, one hundred twenty-six thousand, seven hundred sixty-eight".