135919642937761 has 2 divisors, whose sum is σ = 135919642937762. Its totient is φ = 135919642937760.

The previous prime is 135919642937731. The next prime is 135919642937809. The reversal of 135919642937761 is 167739246919531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111514867203600 + 24404775734161 = 10560060^2 + 4940119^2 .

It is a cyclic number.

It is not a de Polignac number, because 135919642937761 - 2³³ = 135911053003169 is a prime.

It is not a weakly prime, because it can be changed into another prime (135919642937731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67959821468880 + 67959821468881.

It is an arithmetic number, because the mean of its divisors is an integer number (67959821468881).

Almost surely, 2^{135919642937761} is an apocalyptic number.

It is an amenable number.

135919642937761 is a deficient number, since it is larger than the sum of its proper divisors (1).

135919642937761 is an equidigital number, since it uses as much as digits as its factorization.

135919642937761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 462944160, while the sum is 73.

The spelling of 135919642937761 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-one".