190117777609 has 2 divisors, whose sum is σ = 190117777610. Its totient is φ = 190117777608.

The previous prime is 190117777589. The next prime is 190117777627. The reversal of 190117777609 is 906777711091.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161555763600 + 28562014009 = 401940^2 + 169003^2 .

It is a cyclic number.

It is not a de Polignac number, because 190117777609 - 2⁹ = 190117777097 is a prime.

It is a super-2 number, since 2×190117777609² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 190117777609.

It is not a weakly prime, because it can be changed into another prime (190117772609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95058888804 + 95058888805.

It is an arithmetic number, because the mean of its divisors is an integer number (95058888805).

Almost surely, 2^190117777609 is an apocalyptic number.

It is an amenable number.

190117777609 is a deficient number, since it is larger than the sum of its proper divisors (1).

190117777609 is an equidigital number, since it uses as much as digits as its factorization.

190117777609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166886, while the sum is 55.

The spelling of 190117777609 in words is "one hundred ninety billion, one hundred seventeen million, seven hundred seventy-seven thousand, six hundred nine".