898642774721 has 2 divisors, whose sum is σ = 898642774722. Its totient is φ = 898642774720.

The previous prime is 898642774657. The next prime is 898642774741. The reversal of 898642774721 is 127477246898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729766981696 + 168875793025 = 854264^2 + 410945^2 .

It is a cyclic number.

It is not a de Polignac number, because 898642774721 - 2⁶ = 898642774657 is a prime.

It is not a weakly prime, because it can be changed into another prime (898642774741) 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, 449321387360 + 449321387361.

It is an arithmetic number, because the mean of its divisors is an integer number (449321387361).

Almost surely, 2^898642774721 is an apocalyptic number.

It is an amenable number.

898642774721 is a deficient number, since it is larger than the sum of its proper divisors (1).

898642774721 is an equidigital number, since it uses as much as digits as its factorization.

898642774721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75866112, while the sum is 65.

The spelling of 898642774721 in words is "eight hundred ninety-eight billion, six hundred forty-two million, seven hundred seventy-four thousand, seven hundred twenty-one".