64642446194 has 8 divisors (see below), whose sum is σ = 96986708208. Its totient is φ = 32313543460.

The previous prime is 64642446191. The next prime is 64642446221. The reversal of 64642446194 is 49164424646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (64642446191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3829292 + ... + 3846135.

It is an arithmetic number, because the mean of its divisors is an integer number (12123338526).

Almost surely, 2^64642446194 is an apocalyptic number.

64642446194 is a deficient number, since it is larger than the sum of its proper divisors (32344262014).

64642446194 is a wasteful number, since it uses less digits than its factorization.

64642446194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7679640.

The product of its digits is 3981312, while the sum is 50.

The spelling of 64642446194 in words is "sixty-four billion, six hundred forty-two million, four hundred forty-six thousand, one hundred ninety-four".