373159889681 has 2 divisors, whose sum is σ = 373159889682. Its totient is φ = 373159889680.

The previous prime is 373159889677. The next prime is 373159889689. The reversal of 373159889681 is 186988951373.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372599147281 + 560742400 = 610409^2 + 23680^2 .

It is a cyclic number.

It is not a de Polignac number, because 373159889681 - 2² = 373159889677 is a prime.

It is a super-2 number, since 2×373159889681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (373159889689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 186579944840 + 186579944841.

It is an arithmetic number, because the mean of its divisors is an integer number (186579944841).

Almost surely, 2^373159889681 is an apocalyptic number.

It is an amenable number.

373159889681 is a deficient number, since it is larger than the sum of its proper divisors (1).

373159889681 is an equidigital number, since it uses as much as digits as its factorization.

373159889681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 78382080, while the sum is 68.

The spelling of 373159889681 in words is "three hundred seventy-three billion, one hundred fifty-nine million, eight hundred eighty-nine thousand, six hundred eighty-one".