190137778769 has 2 divisors, whose sum is σ = 190137778770. Its totient is φ = 190137778768.

The previous prime is 190137778729. The next prime is 190137778837. The reversal of 190137778769 is 967877731091.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188646892225 + 1490886544 = 434335^2 + 38612^2 .

It is a cyclic number.

It is not a de Polignac number, because 190137778769 - 2²⁰ = 190136730193 is a prime.

It is a super-2 number, since 2×190137778769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190137778729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95068889384 + 95068889385.

It is an arithmetic number, because the mean of its divisors is an integer number (95068889385).

Almost surely, 2^190137778769 is an apocalyptic number.

It is an amenable number.

190137778769 is a deficient number, since it is larger than the sum of its proper divisors (1).

190137778769 is an equidigital number, since it uses as much as digits as its factorization.

190137778769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28005264, while the sum is 65.

The spelling of 190137778769 in words is "one hundred ninety billion, one hundred thirty-seven million, seven hundred seventy-eight thousand, seven hundred sixty-nine".