31776767536049 has 2 divisors, whose sum is σ = 31776767536050. Its totient is φ = 31776767536048.

The previous prime is 31776767535991. The next prime is 31776767536051. The reversal of 31776767536049 is 94063576767713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27817523189824 + 3959244346225 = 5274232^2 + 1989785^2 .

It is a cyclic number.

It is not a de Polignac number, because 31776767536049 - 2¹² = 31776767531953 is a prime.

It is a Sophie Germain prime.

Together with 31776767536051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (31776767536079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15888383768024 + 15888383768025.

It is an arithmetic number, because the mean of its divisors is an integer number (15888383768025).

Almost surely, 2^{31776767536049} is an apocalyptic number.

It is an amenable number.

31776767536049 is a deficient number, since it is larger than the sum of its proper divisors (1).

31776767536049 is an equidigital number, since it uses as much as digits as its factorization.

31776767536049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840157920, while the sum is 71.

The spelling of 31776767536049 in words is "thirty-one trillion, seven hundred seventy-six billion, seven hundred sixty-seven million, five hundred thirty-six thousand, forty-nine".