122783956779 has 16 divisors (see below), whose sum is σ = 180855544320. Its totient is φ = 73472561760.

The previous prime is 122783956751. The next prime is 122783956787. The reversal of 122783956779 is 977659387221.

It is not a de Polignac number, because 122783956779 - 2⁸ = 122783956523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122783956879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23546292 + ... + 23551505.

It is an arithmetic number, because the mean of its divisors is an integer number (11303471520).

Almost surely, 2^122783956779 is an apocalyptic number.

122783956779 is a deficient number, since it is larger than the sum of its proper divisors (58071587541).

122783956779 is a wasteful number, since it uses less digits than its factorization.

122783956779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47097890.

The product of its digits is 80015040, while the sum is 66.

The spelling of 122783956779 in words is "one hundred twenty-two billion, seven hundred eighty-three million, nine hundred fifty-six thousand, seven hundred seventy-nine".