531697655677 has 2 divisors, whose sum is σ = 531697655678. Its totient is φ = 531697655676.

The previous prime is 531697655639. The next prime is 531697655681. The reversal of 531697655677 is 776556796135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380523661956 + 151173993721 = 616866^2 + 388811^2 .

It is a cyclic number.

It is not a de Polignac number, because 531697655677 - 2¹⁵ = 531697622909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531697655627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265848827838 + 265848827839.

It is an arithmetic number, because the mean of its divisors is an integer number (265848827839).

Almost surely, 2^531697655677 is an apocalyptic number.

It is an amenable number.

531697655677 is a deficient number, since it is larger than the sum of its proper divisors (1).

531697655677 is an equidigital number, since it uses as much as digits as its factorization.

531697655677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250047000, while the sum is 67.

The spelling of 531697655677 in words is "five hundred thirty-one billion, six hundred ninety-seven million, six hundred fifty-five thousand, six hundred seventy-seven".