122345556785 has 4 divisors (see below), whose sum is σ = 146814668148. Its totient is φ = 97876445424.

The previous prime is 122345556779. The next prime is 122345556793. The reversal of 122345556785 is 587655543221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14562696976 + 107782859809 = 120676^2 + 328303^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122345556785 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 12234555674 + ... + 12234555683.

It is an arithmetic number, because the mean of its divisors is an integer number (36703667037).

Almost surely, 2^122345556785 is an apocalyptic number.

It is an amenable number.

122345556785 is a deficient number, since it is larger than the sum of its proper divisors (24469111363).

122345556785 is an equidigital number, since it uses as much as digits as its factorization.

122345556785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24469111362.

The product of its digits is 10080000, while the sum is 53.

The spelling of 122345556785 in words is "one hundred twenty-two billion, three hundred forty-five million, five hundred fifty-six thousand, seven hundred eighty-five".