190137778837 has 2 divisors, whose sum is σ = 190137778838. Its totient is φ = 190137778836.

The previous prime is 190137778769. The next prime is 190137778871. The reversal of 190137778837 is 738877731091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 181877513841 + 8260264996 = 426471^2 + 90886^2 .

It is an emirp because it is prime and its reverse (738877731091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190137778837 - 2³⁵ = 155778040469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190137778877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95068889418 + 95068889419.

It is an arithmetic number, because the mean of its divisors is an integer number (95068889419).

Almost surely, 2^190137778837 is an apocalyptic number.

It is an amenable number.

190137778837 is a deficient number, since it is larger than the sum of its proper divisors (1).

190137778837 is an equidigital number, since it uses as much as digits as its factorization.

190137778837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12446784, while the sum is 61.

The spelling of 190137778837 in words is "one hundred ninety billion, one hundred thirty-seven million, seven hundred seventy-eight thousand, eight hundred thirty-seven".