31669315187687 has 2 divisors, whose sum is σ = 31669315187688. Its totient is φ = 31669315187686.

The previous prime is 31669315187683. The next prime is 31669315187689. The reversal of 31669315187687 is 78678151396613.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31669315187687 - 2² = 31669315187683 is a prime.

Together with 31669315187689, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31669315187687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31669315187683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15834657593843 + 15834657593844.

It is an arithmetic number, because the mean of its divisors is an integer number (15834657593844).

Almost surely, 2^{31669315187687} is an apocalyptic number.

31669315187687 is a deficient number, since it is larger than the sum of its proper divisors (1).

31669315187687 is an equidigital number, since it uses as much as digits as its factorization.

31669315187687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 274337280, while the sum is 71.

The spelling of 31669315187687 in words is "thirty-one trillion, six hundred sixty-nine billion, three hundred fifteen million, one hundred eighty-seven thousand, six hundred eighty-seven".