135151821169 has 2 divisors, whose sum is σ = 135151821170. Its totient is φ = 135151821168.

The previous prime is 135151821137. The next prime is 135151821191. The reversal of 135151821169 is 961128151531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126152832400 + 8998988769 = 355180^2 + 94863^2 .

It is a cyclic number.

It is not a de Polignac number, because 135151821169 - 2⁵ = 135151821137 is a prime.

It is a super-2 number, since 2×135151821169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135151821199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67575910584 + 67575910585.

It is an arithmetic number, because the mean of its divisors is an integer number (67575910585).

Almost surely, 2^135151821169 is an apocalyptic number.

It is an amenable number.

135151821169 is a deficient number, since it is larger than the sum of its proper divisors (1).

135151821169 is an equidigital number, since it uses as much as digits as its factorization.

135151821169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 43.

The spelling of 135151821169 in words is "one hundred thirty-five billion, one hundred fifty-one million, eight hundred twenty-one thousand, one hundred sixty-nine".