31985504394 has 16 divisors (see below), whose sum is σ = 63973875168. Its totient is φ = 10661357072.

The previous prime is 31985504389. The next prime is 31985504407. The reversal of 31985504394 is 49340558913.

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, 42529 + ... + 256475.

It is an arithmetic number, because the mean of its divisors is an integer number (3998367198).

Almost surely, 2^31985504394 is an apocalyptic number.

31985504394 is an abundant number, since it is smaller than the sum of its proper divisors (31988370774).

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

31985504394 is a wasteful number, since it uses less digits than its factorization.

31985504394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238869.

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 31985504394 in words is "thirty-one billion, nine hundred eighty-five million, five hundred four thousand, three hundred ninety-four".