231776782118957 has 2 divisors, whose sum is σ = 231776782118958. Its totient is φ = 231776782118956.

The previous prime is 231776782118951. The next prime is 231776782118977. The reversal of 231776782118957 is 759811287677132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214434171632041 + 17342610486916 = 14643571^2 + 4164446^2 .

It is a cyclic number.

It is not a de Polignac number, because 231776782118957 - 2¹² = 231776782114861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231776782118951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115888391059478 + 115888391059479.

It is an arithmetic number, because the mean of its divisors is an integer number (115888391059479).

Almost surely, 2^{231776782118957} is an apocalyptic number.

It is an amenable number.

231776782118957 is a deficient number, since it is larger than the sum of its proper divisors (1).

231776782118957 is an equidigital number, since it uses as much as digits as its factorization.

231776782118957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497871360, while the sum is 74.

The spelling of 231776782118957 in words is "two hundred thirty-one trillion, seven hundred seventy-six billion, seven hundred eighty-two million, one hundred eighteen thousand, nine hundred fifty-seven".