190459618121 has 2 divisors, whose sum is σ = 190459618122. Its totient is φ = 190459618120.

The previous prime is 190459618091. The next prime is 190459618169. The reversal of 190459618121 is 121816954091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97593760000 + 92865858121 = 312400^2 + 304739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190459618121 is a prime.

It is a super-2 number, since 2×190459618121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190459618621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95229809060 + 95229809061.

It is an arithmetic number, because the mean of its divisors is an integer number (95229809061).

Almost surely, 2^190459618121 is an apocalyptic number.

It is an amenable number.

190459618121 is a deficient number, since it is larger than the sum of its proper divisors (1).

190459618121 is an equidigital number, since it uses as much as digits as its factorization.

190459618121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 47.

The spelling of 190459618121 in words is "one hundred ninety billion, four hundred fifty-nine million, six hundred eighteen thousand, one hundred twenty-one".