190137778613 has 2 divisors, whose sum is σ = 190137778614. Its totient is φ = 190137778612.

The previous prime is 190137778609. The next prime is 190137778639. The reversal of 190137778613 is 316877731091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189087564964 + 1050213649 = 434842^2 + 32407^2 .

It is a cyclic number.

It is not a de Polignac number, because 190137778613 - 2² = 190137778609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (190137778603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95068889306 + 95068889307.

It is an arithmetic number, because the mean of its divisors is an integer number (95068889307).

Almost surely, 2^190137778613 is an apocalyptic number.

It is an amenable number.

190137778613 is a deficient number, since it is larger than the sum of its proper divisors (1).

190137778613 is an equidigital number, since it uses as much as digits as its factorization.

190137778613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1333584, while the sum is 53.

The spelling of 190137778613 in words is "one hundred ninety billion, one hundred thirty-seven million, seven hundred seventy-eight thousand, six hundred thirteen".