190590853201981 has 2 divisors, whose sum is σ = 190590853201982. Its totient is φ = 190590853201980.

The previous prime is 190590853201877. The next prime is 190590853202003. The reversal of 190590853201981 is 189102358095091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181344844676356 + 9246008525625 = 13466434^2 + 3040725^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190590853201981 is a prime.

It is a super-2 number, since 2×190590853201981² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190590853231981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95295426600990 + 95295426600991.

It is an arithmetic number, because the mean of its divisors is an integer number (95295426600991).

Almost surely, 2^{190590853201981} is an apocalyptic number.

It is an amenable number.

190590853201981 is a deficient number, since it is larger than the sum of its proper divisors (1).

190590853201981 is an equidigital number, since it uses as much as digits as its factorization.

190590853201981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6998400, while the sum is 61.

The spelling of 190590853201981 in words is "one hundred ninety trillion, five hundred ninety billion, eight hundred fifty-three million, two hundred one thousand, nine hundred eighty-one".