698880664631 has 2 divisors, whose sum is σ = 698880664632. Its totient is φ = 698880664630.

The previous prime is 698880664609. The next prime is 698880664687. The reversal of 698880664631 is 136466088896.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-698880664631 is a prime.

It is a super-2 number, since 2×698880664631² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698880664931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349440332315 + 349440332316.

It is an arithmetic number, because the mean of its divisors is an integer number (349440332316).

Almost surely, 2^698880664631 is an apocalyptic number.

698880664631 is a deficient number, since it is larger than the sum of its proper divisors (1).

698880664631 is an equidigital number, since it uses as much as digits as its factorization.

698880664631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71663616, while the sum is 65.

The spelling of 698880664631 in words is "six hundred ninety-eight billion, eight hundred eighty million, six hundred sixty-four thousand, six hundred thirty-one".