135919642937765 has 8 divisors (see below), whose sum is σ = 163147929331320. Its totient is φ = 108706142479552.

The previous prime is 135919642937761. The next prime is 135919642937809. The reversal of 135919642937765 is 567739246919531.

It is a Cunningham number, because it is equal to 11658458²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 48931060265476 + 86988582672289 = 6995074^2 + 9326767^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135919642937765 - 2² = 135919642937761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135919642937761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3696463610 + ... + 3696500379.

It is an arithmetic number, because the mean of its divisors is an integer number (20393491166415).

Almost surely, 2^{135919642937765} is an apocalyptic number.

It is an amenable number.

135919642937765 is a deficient number, since it is larger than the sum of its proper divisors (27228286393555).

135919642937765 is an equidigital number, since it uses as much as digits as its factorization.

135919642937765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7392967671.

The product of its digits is 2314720800, while the sum is 77.

The spelling of 135919642937765 in words is "one hundred thirty-five trillion, nine hundred nineteen billion, six hundred forty-two million, nine hundred thirty-seven thousand, seven hundred sixty-five".