190995656569 has 2 divisors, whose sum is σ = 190995656570. Its totient is φ = 190995656568.

The previous prime is 190995656543. The next prime is 190995656573. The reversal of 190995656569 is 965656599091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190969000000 + 26656569 = 437000^2 + 5163^2 .

It is a cyclic number.

It is not a de Polignac number, because 190995656569 - 2²⁵ = 190962102137 is a prime.

It is a super-2 number, since 2×190995656569² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 190995656498 and 190995656507.

It is not a weakly prime, because it can be changed into another prime (190995656519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95497828284 + 95497828285.

It is an arithmetic number, because the mean of its divisors is an integer number (95497828285).

Almost surely, 2^190995656569 is an apocalyptic number.

It is an amenable number.

190995656569 is a deficient number, since it is larger than the sum of its proper divisors (1).

190995656569 is an equidigital number, since it uses as much as digits as its factorization.

190995656569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 177147000, while the sum is 70.

The spelling of 190995656569 in words is "one hundred ninety billion, nine hundred ninety-five million, six hundred fifty-six thousand, five hundred sixty-nine".