561172283923 has 2 divisors, whose sum is σ = 561172283924. Its totient is φ = 561172283922.

The previous prime is 561172283863. The next prime is 561172283993. The reversal of 561172283923 is 329382271165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561172283923 - 2²⁵ = 561138729491 is a prime.

It is a super-2 number, since 2×561172283923² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (561172283993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280586141961 + 280586141962.

It is an arithmetic number, because the mean of its divisors is an integer number (280586141962).

Almost surely, 2^561172283923 is an apocalyptic number.

561172283923 is a deficient number, since it is larger than the sum of its proper divisors (1).

561172283923 is an equidigital number, since it uses as much as digits as its factorization.

561172283923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 49.

The spelling of 561172283923 in words is "five hundred sixty-one billion, one hundred seventy-two million, two hundred eighty-three thousand, nine hundred twenty-three".