64761026688 has 320 divisors, whose sum is σ = 196208179200. Its totient is φ = 21201481728.

The previous prime is 64761026683. The next prime is 64761026719. The reversal of 64761026688 is 88662016746.

64761026688 is a `hidden beast` number, since 6 + 476 + 102 + 6 + 68 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (64761026683) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 180392653 + ... + 180393011.

It is an arithmetic number, because the mean of its divisors is an integer number (613150560).

Almost surely, 2^64761026688 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 64761026688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98104089600).

64761026688 is an abundant number, since it is smaller than the sum of its proper divisors (131447152512).

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

64761026688 is a wasteful number, since it uses less digits than its factorization.

64761026688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 54.

The spelling of 64761026688 in words is "sixty-four billion, seven hundred sixty-one million, twenty-six thousand, six hundred eighty-eight".