691657982263 has 2 divisors, whose sum is σ = 691657982264. Its totient is φ = 691657982262.

The previous prime is 691657982201. The next prime is 691657982303. The reversal of 691657982263 is 362289756196.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 691657982263 - 2¹⁷ = 691657851191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 691657982195 and 691657982204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (691657982363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345828991131 + 345828991132.

It is an arithmetic number, because the mean of its divisors is an integer number (345828991132).

Almost surely, 2^691657982263 is an apocalyptic number.

691657982263 is a deficient number, since it is larger than the sum of its proper divisors (1).

691657982263 is an equidigital number, since it uses as much as digits as its factorization.

691657982263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58786560, while the sum is 64.

The spelling of 691657982263 in words is "six hundred ninety-one billion, six hundred fifty-seven million, nine hundred eighty-two thousand, two hundred sixty-three".