698881188961 has 2 divisors, whose sum is σ = 698881188962. Its totient is φ = 698881188960.

The previous prime is 698881188919. The next prime is 698881188977. The reversal of 698881188961 is 169881188896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670629966400 + 28251222561 = 818920^2 + 168081^2 .

It is a cyclic number.

It is not a de Polignac number, because 698881188961 - 2²⁷ = 698746971233 is a prime.

It is not a weakly prime, because it can be changed into another prime (698881188361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349440594480 + 349440594481.

It is an arithmetic number, because the mean of its divisors is an integer number (349440594481).

Almost surely, 2^698881188961 is an apocalyptic number.

It is an amenable number.

698881188961 is a deficient number, since it is larger than the sum of its proper divisors (1).

698881188961 is an equidigital number, since it uses as much as digits as its factorization.

698881188961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95551488, while the sum is 73.

The spelling of 698881188961 in words is "six hundred ninety-eight billion, eight hundred eighty-one million, one hundred eighty-eight thousand, nine hundred sixty-one".