135203272861 has 2 divisors, whose sum is σ = 135203272862. Its totient is φ = 135203272860.

The previous prime is 135203272843. The next prime is 135203272877. The reversal of 135203272861 is 168272302531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94427144100 + 40776128761 = 307290^2 + 201931^2 .

It is an emirp because it is prime and its reverse (168272302531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135203272861 - 2⁵ = 135203272829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135203272801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67601636430 + 67601636431.

It is an arithmetic number, because the mean of its divisors is an integer number (67601636431).

Almost surely, 2^135203272861 is an apocalyptic number.

It is an amenable number.

135203272861 is a deficient number, since it is larger than the sum of its proper divisors (1).

135203272861 is an equidigital number, since it uses as much as digits as its factorization.

135203272861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 135203272861 in words is "one hundred thirty-five billion, two hundred three million, two hundred seventy-two thousand, eight hundred sixty-one".