190154011609 has 2 divisors, whose sum is σ = 190154011610. Its totient is φ = 190154011608.

The previous prime is 190154011601. The next prime is 190154011651. The reversal of 190154011609 is 906110451091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183565118025 + 6588893584 = 428445^2 + 81172^2 .

It is a cyclic number.

It is not a de Polignac number, because 190154011609 - 2³ = 190154011601 is a prime.

It is not a weakly prime, because it can be changed into another prime (190154011601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95077005804 + 95077005805.

It is an arithmetic number, because the mean of its divisors is an integer number (95077005805).

Almost surely, 2^190154011609 is an apocalyptic number.

It is an amenable number.

190154011609 is a deficient number, since it is larger than the sum of its proper divisors (1).

190154011609 is an equidigital number, since it uses as much as digits as its factorization.

190154011609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 37.

The spelling of 190154011609 in words is "one hundred ninety billion, one hundred fifty-four million, eleven thousand, six hundred nine".