64790854668 has 144 divisors (see below), whose sum is σ = 175414864800. Its totient is φ = 20668677120.

The previous prime is 64790854633. The next prime is 64790854669. The reversal of 64790854668 is 86645809746.

64790854668 is a `hidden beast` number, since 6 + 4 + 7 + 90 + 85 + 466 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (64790854669) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12435648 + ... + 12440856.

Almost surely, 2^64790854668 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 64790854668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87707432400).

64790854668 is an abundant number, since it is smaller than the sum of its proper divisors (110624010132).

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

64790854668 is a wasteful number, since it uses less digits than its factorization.

64790854668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 64790854668 in words is "sixty-four billion, seven hundred ninety million, eight hundred fifty-four thousand, six hundred sixty-eight".