135657326624861 has 2 divisors, whose sum is σ = 135657326624862. Its totient is φ = 135657326624860.

The previous prime is 135657326624773. The next prime is 135657326624867. The reversal of 135657326624861 is 168426623756531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127075907112025 + 8581419512836 = 11272795^2 + 2929406^2 .

It is a cyclic number.

It is not a de Polignac number, because 135657326624861 - 2³⁴ = 135640146755677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135657326624867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67828663312430 + 67828663312431.

It is an arithmetic number, because the mean of its divisors is an integer number (67828663312431).

Almost surely, 2^{135657326624861} is an apocalyptic number.

It is an amenable number.

135657326624861 is a deficient number, since it is larger than the sum of its proper divisors (1).

135657326624861 is an equidigital number, since it uses as much as digits as its factorization.

135657326624861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 261273600, while the sum is 65.

The spelling of 135657326624861 in words is "one hundred thirty-five trillion, six hundred fifty-seven billion, three hundred twenty-six million, six hundred twenty-four thousand, eight hundred sixty-one".