31910973641 has 8 divisors (see below), whose sum is σ = 31994870400. Its totient is φ = 31827188080.

The previous prime is 31910973637. The next prime is 31910973673. The reversal of 31910973641 is 14637901913.

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

It is a cyclic number.

It is not a de Polignac number, because 31910973641 - 2² = 31910973637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31910973592 and 31910973601.

It is not an unprimeable number, because it can be changed into a prime (31910373641) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 563270 + ... + 617328.

It is an arithmetic number, because the mean of its divisors is an integer number (3999358800).

Almost surely, 2^31910973641 is an apocalyptic number.

It is an amenable number.

31910973641 is a deficient number, since it is larger than the sum of its proper divisors (83896759).

31910973641 is an equidigital number, since it uses as much as digits as its factorization.

31910973641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55599.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 31910973641 in words is "thirty-one billion, nine hundred ten million, nine hundred seventy-three thousand, six hundred forty-one".