31612180863 has 4 divisors (see below), whose sum is σ = 42149574488. Its totient is φ = 21074787240.

The previous prime is 31612180813. The next prime is 31612180877. The reversal of 31612180863 is 36808121613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36808121613 = 3 ⋅12269373871.

It is not a de Polignac number, because 31612180863 - 2⁹ = 31612180351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31612180813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5268696808 + ... + 5268696813.

It is an arithmetic number, because the mean of its divisors is an integer number (10537393622).

Almost surely, 2^31612180863 is an apocalyptic number.

31612180863 is a deficient number, since it is larger than the sum of its proper divisors (10537393625).

31612180863 is a wasteful number, since it uses less digits than its factorization.

31612180863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10537393624.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 31612180863 in words is "thirty-one billion, six hundred twelve million, one hundred eighty thousand, eight hundred sixty-three".