64692845568 has 528 divisors, whose sum is σ = 222423679296. Its totient is φ = 17907056640.

The previous prime is 64692845501. The next prime is 64692845573. The reversal of 64692845568 is 86554829646.

64692845568 is a `hidden beast` number, since 6 + 4 + 6 + 9 + 28 + 45 + 568 = 666.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46844238 + ... + 46845618.

Almost surely, 2^64692845568 is an apocalyptic number.

64692845568 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64692845568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111211839648).

64692845568 is an abundant number, since it is smaller than the sum of its proper divisors (157730833728).

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

64692845568 is a wasteful number, since it uses less digits than its factorization.

64692845568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460 (or 1439 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 63.

The spelling of 64692845568 in words is "sixty-four billion, six hundred ninety-two million, eight hundred forty-five thousand, five hundred sixty-eight".