31700016891 has 6 divisors (see below), whose sum is σ = 45788913300. Its totient is φ = 21133344588.

The previous prime is 31700016877. The next prime is 31700016919. The reversal of 31700016891 is 19861000713.

It is not a de Polignac number, because 31700016891 - 2⁷ = 31700016763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31700016871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1761112041 + ... + 1761112058.

It is an arithmetic number, because the mean of its divisors is an integer number (7631485550).

Almost surely, 2^31700016891 is an apocalyptic number.

31700016891 is a deficient number, since it is larger than the sum of its proper divisors (14088896409).

31700016891 is a wasteful number, since it uses less digits than its factorization.

31700016891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522224105 (or 3522224102 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The spelling of 31700016891 in words is "thirty-one billion, seven hundred million, sixteen thousand, eight hundred ninety-one".