122677255577 has 4 divisors (see below), whose sum is σ = 122677977396. Its totient is φ = 122676533760.

The previous prime is 122677255553. The next prime is 122677255681. The reversal of 122677255577 is 775552776221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 775552776221 = 31 ⋅25017831491.

It can be written as a sum of positive squares in 2 ways, for example, as 102282273856 + 20394981721 = 319816^2 + 142811^2 .

It is a cyclic number.

It is not a de Polignac number, because 122677255577 - 2⁸ = 122677255321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122677255507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49877 + ... + 497837.

It is an arithmetic number, because the mean of its divisors is an integer number (30669494349).

Almost surely, 2^122677255577 is an apocalyptic number.

It is an amenable number.

122677255577 is a deficient number, since it is larger than the sum of its proper divisors (721819).

122677255577 is an equidigital number, since it uses as much as digits as its factorization.

122677255577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721818.

The product of its digits is 14406000, while the sum is 56.

The spelling of 122677255577 in words is "one hundred twenty-two billion, six hundred seventy-seven million, two hundred fifty-five thousand, five hundred seventy-seven".