823422780755 has 4 divisors (see below), whose sum is σ = 988107336912. Its totient is φ = 658738224600.

The previous prime is 823422780721. The next prime is 823422780779. The reversal of 823422780755 is 557087224328.

It is a happy number.

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

It is not a de Polignac number, because 823422780755 - 2²² = 823418586451 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 823422780697 and 823422780706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82342278071 + ... + 82342278080.

It is an arithmetic number, because the mean of its divisors is an integer number (247026834228).

Almost surely, 2^823422780755 is an apocalyptic number.

823422780755 is a deficient number, since it is larger than the sum of its proper divisors (164684556157).

823422780755 is a wasteful number, since it uses less digits than its factorization.

823422780755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164684556156.

The product of its (nonzero) digits is 7526400, while the sum is 53.

The spelling of 823422780755 in words is "eight hundred twenty-three billion, four hundred twenty-two million, seven hundred eighty thousand, seven hundred fifty-five".