31404068569 has 2 divisors, whose sum is σ = 31404068570. Its totient is φ = 31404068568.

The previous prime is 31404068557. The next prime is 31404068603. The reversal of 31404068569 is 96586040413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30559584969 + 844483600 = 174813^2 + 29060^2 .

It is a cyclic number.

It is not a de Polignac number, because 31404068569 - 2⁷ = 31404068441 is a prime.

It is a super-2 number, since 2×31404068569² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31404068369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15702034284 + 15702034285.

It is an arithmetic number, because the mean of its divisors is an integer number (15702034285).

Almost surely, 2^31404068569 is an apocalyptic number.

It is an amenable number.

31404068569 is a deficient number, since it is larger than the sum of its proper divisors (1).

31404068569 is an equidigital number, since it uses as much as digits as its factorization.

31404068569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 31404068569 in words is "thirty-one billion, four hundred four million, sixty-eight thousand, five hundred sixty-nine".