31861136434 has 8 divisors (see below), whose sum is σ = 47837267100. Its totient is φ = 15915380736.

The previous prime is 31861136407. The next prime is 31861136441. The reversal of 31861136434 is 43463116813.

It can be written as a sum of positive squares in 2 ways, for example, as 31700734209 + 160402225 = 178047^2 + 12665^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7591119 + ... + 7595314.

Almost surely, 2^31861136434 is an apocalyptic number.

31861136434 is a deficient number, since it is larger than the sum of its proper divisors (15976130666).

31861136434 is a wasteful number, since it uses less digits than its factorization.

31861136434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15187484.

The product of its digits is 124416, while the sum is 40.

The spelling of 31861136434 in words is "thirty-one billion, eight hundred sixty-one million, one hundred thirty-six thousand, four hundred thirty-four".