31655628841 has 2 divisors, whose sum is σ = 31655628842. Its totient is φ = 31655628840.

The previous prime is 31655628761. The next prime is 31655628863. The reversal of 31655628841 is 14882655613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28083056400 + 3572572441 = 167580^2 + 59771^2 .

It is a cyclic number.

It is not a de Polignac number, because 31655628841 - 2¹⁵ = 31655596073 is a prime.

It is not a weakly prime, because it can be changed into another prime (31655628881) 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 as a sum of consecutive naturals, namely, 15827814420 + 15827814421.

It is an arithmetic number, because the mean of its divisors is an integer number (15827814421).

Almost surely, 2^31655628841 is an apocalyptic number.

It is an amenable number.

31655628841 is a deficient number, since it is larger than the sum of its proper divisors (1).

31655628841 is an equidigital number, since it uses as much as digits as its factorization.

31655628841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382400, while the sum is 49.

The spelling of 31655628841 in words is "thirty-one billion, six hundred fifty-five million, six hundred twenty-eight thousand, eight hundred forty-one".