31677049969 has 2 divisors, whose sum is σ = 31677049970. Its totient is φ = 31677049968.

The previous prime is 31677049949. The next prime is 31677049973. The reversal of 31677049969 is 96994077613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30569025600 + 1108024369 = 174840^2 + 33287^2 .

It is a cyclic number.

It is not a de Polignac number, because 31677049969 - 2²⁵ = 31643495537 is a prime.

It is a super-2 number, since 2×31677049969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31677049949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15838524984 + 15838524985.

It is an arithmetic number, because the mean of its divisors is an integer number (15838524985).

Almost surely, 2^31677049969 is an apocalyptic number.

It is an amenable number.

31677049969 is a deficient number, since it is larger than the sum of its proper divisors (1).

31677049969 is an equidigital number, since it uses as much as digits as its factorization.

31677049969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15431472, while the sum is 61.

The spelling of 31677049969 in words is "thirty-one billion, six hundred seventy-seven million, forty-nine thousand, nine hundred sixty-nine".