122657828897 has 4 divisors (see below), whose sum is σ = 122758617156. Its totient is φ = 122557040640.

The previous prime is 122657828893. The next prime is 122657828939. The reversal of 122657828897 is 798828756221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798828756221 = 4583 ⋅174302587.

It can be written as a sum of positive squares in 2 ways, for example, as 63647216656 + 59010612241 = 252284^2 + 242921^2 .

It is a cyclic number.

It is not a de Polignac number, because 122657828897 - 2² = 122657828893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122657828893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50392304 + ... + 50394737.

It is an arithmetic number, because the mean of its divisors is an integer number (30689654289).

Almost surely, 2^122657828897 is an apocalyptic number.

It is an amenable number.

122657828897 is a deficient number, since it is larger than the sum of its proper divisors (100788259).

122657828897 is a wasteful number, since it uses less digits than its factorization.

122657828897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100788258.

The product of its digits is 54190080, while the sum is 65.

The spelling of 122657828897 in words is "one hundred twenty-two billion, six hundred fifty-seven million, eight hundred twenty-eight thousand, eight hundred ninety-seven".