64199052778896 has 480 divisors, whose sum is σ = 216641865842688. Its totient is φ = 17359301652480.

The previous prime is 64199052778843. The next prime is 64199052778909. The reversal of 64199052778896 is 69887725099146.

64199052778896 is a `hidden beast` number, since 6 + 4 + 1 + 9 + 9 + 0 + 527 + 7 + 8 + 89 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1904829981 + ... + 1904863683.

Almost surely, 2^{64199052778896} 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 64199052778896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108320932921344).

64199052778896 is an abundant number, since it is smaller than the sum of its proper divisors (152442813063792).

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

64199052778896 is a wasteful number, since it uses less digits than its factorization.

64199052778896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35099 (or 35090 counting only the distinct ones).

The product of its (nonzero) digits is 3292047360, while the sum is 81.

The spelling of 64199052778896 in words is "sixty-four trillion, one hundred ninety-nine billion, fifty-two million, seven hundred seventy-eight thousand, eight hundred ninety-six".