31673845261 has 4 divisors (see below), whose sum is σ = 33050968992. Its totient is φ = 30296721532.

The previous prime is 31673845237. The next prime is 31673845267. The reversal of 31673845261 is 16254837613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31673845261 - 2⁹ = 31673844749 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 (31673845267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688561831 + ... + 688561876.

It is an arithmetic number, because the mean of its divisors is an integer number (8262742248).

Almost surely, 2^31673845261 is an apocalyptic number.

It is an amenable number.

31673845261 is a deficient number, since it is larger than the sum of its proper divisors (1377123731).

31673845261 is a wasteful number, since it uses less digits than its factorization.

31673845261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377123730.

The product of its digits is 725760, while the sum is 46.

The spelling of 31673845261 in words is "thirty-one billion, six hundred seventy-three million, eight hundred forty-five thousand, two hundred sixty-one".