136855280977 has 2 divisors, whose sum is σ = 136855280978. Its totient is φ = 136855280976.

The previous prime is 136855280971. The next prime is 136855280987. The reversal of 136855280977 is 779082558631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73896441921 + 62958839056 = 271839^2 + 250916^2 .

It is a cyclic number.

It is not a de Polignac number, because 136855280977 - 2³⁵ = 102495542609 is a prime.

It is not a weakly prime, because it can be changed into another prime (136855280971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68427640488 + 68427640489.

It is an arithmetic number, because the mean of its divisors is an integer number (68427640489).

Almost surely, 2^136855280977 is an apocalyptic number.

It is an amenable number.

136855280977 is a deficient number, since it is larger than the sum of its proper divisors (1).

136855280977 is an equidigital number, since it uses as much as digits as its factorization.

136855280977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25401600, while the sum is 61.

The spelling of 136855280977 in words is "one hundred thirty-six billion, eight hundred fifty-five million, two hundred eighty thousand, nine hundred seventy-seven".