394564991722 has 16 divisors (see below), whose sum is σ = 645699600000. Its totient is φ = 179334447040.

The previous prime is 394564991713. The next prime is 394564991803. The reversal of 394564991722 is 227199465493.

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, 356722 + ... + 957277.

It is an arithmetic number, because the mean of its divisors is an integer number (40356225000).

Almost surely, 2^394564991722 is an apocalyptic number.

394564991722 is a deficient number, since it is larger than the sum of its proper divisors (251134608278).

394564991722 is a wasteful number, since it uses less digits than its factorization.

394564991722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327661.

The product of its digits is 29393280, while the sum is 61.

The spelling of 394564991722 in words is "three hundred ninety-four billion, five hundred sixty-four million, nine hundred ninety-one thousand, seven hundred twenty-two".