64199879994 has 16 divisors (see below), whose sum is σ = 128403155232. Its totient is φ = 21399394128.

The previous prime is 64199879987. The next prime is 64199880029. The reversal of 64199879994 is 49997899146.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150792 + ... + 388764.

It is an arithmetic number, because the mean of its divisors is an integer number (8025197202).

Almost surely, 2^64199879994 is an apocalyptic number.

64199879994 is an abundant number, since it is smaller than the sum of its proper divisors (64203275238).

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

64199879994 is a wasteful number, since it uses less digits than its factorization.

64199879994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282941.

The product of its digits is 317447424, while the sum is 75.

The spelling of 64199879994 in words is "sixty-four billion, one hundred ninety-nine million, eight hundred seventy-nine thousand, nine hundred ninety-four".