12655715777 has 2 divisors, whose sum is σ = 12655715778. Its totient is φ = 12655715776.

The previous prime is 12655715771. The next prime is 12655715783. The reversal of 12655715777 is 77751755621.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (12655715771) and next prime (12655715783).

It can be written as a sum of positive squares in only one way, i.e., 11647589776 + 1008126001 = 107924^2 + 31751^2 .

It is a cyclic number.

It is not a de Polignac number, because 12655715777 - 2²⁴ = 12638938561 is a prime.

It is not a weakly prime, because it can be changed into another prime (12655715771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6327857888 + 6327857889.

It is an arithmetic number, because the mean of its divisors is an integer number (6327857889).

Almost surely, 2^12655715777 is an apocalyptic number.

It is an amenable number.

12655715777 is a deficient number, since it is larger than the sum of its proper divisors (1).

12655715777 is an equidigital number, since it uses as much as digits as its factorization.

12655715777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3601500, while the sum is 53.

The spelling of 12655715777 in words is "twelve billion, six hundred fifty-five million, seven hundred fifteen thousand, seven hundred seventy-seven".