890177614681 has 2 divisors, whose sum is σ = 890177614682. Its totient is φ = 890177614680.

The previous prime is 890177614633. The next prime is 890177614709. The reversal of 890177614681 is 186416771098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880359975625 + 9817639056 = 938275^2 + 99084^2 .

It is a cyclic number.

It is not a de Polignac number, because 890177614681 - 2²⁷ = 890043396953 is a prime.

It is a super-2 number, since 2×890177614681² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (890177614981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 445088807340 + 445088807341.

It is an arithmetic number, because the mean of its divisors is an integer number (445088807341).

Almost surely, 2^890177614681 is an apocalyptic number.

It is an amenable number.

890177614681 is a deficient number, since it is larger than the sum of its proper divisors (1).

890177614681 is an equidigital number, since it uses as much as digits as its factorization.

890177614681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4064256, while the sum is 58.

The spelling of 890177614681 in words is "eight hundred ninety billion, one hundred seventy-seven million, six hundred fourteen thousand, six hundred eighty-one".