561116727831 has 32 divisors (see below), whose sum is σ = 864972815616. Its totient is φ = 319772864000.

The previous prime is 561116727823. The next prime is 561116727841. The reversal of 561116727831 is 138727611165.

It is a cyclic number.

It is not a de Polignac number, because 561116727831 - 2³ = 561116727823 is a prime.

It is a super-2 number, since 2×561116727831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561116727841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153661 + ... + 1070441.

It is an arithmetic number, because the mean of its divisors is an integer number (27030400488).

Almost surely, 2^561116727831 is an apocalyptic number.

561116727831 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

561116727831 is a deficient number, since it is larger than the sum of its proper divisors (303856087785).

561116727831 is a wasteful number, since it uses less digits than its factorization.

561116727831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917903.

The product of its digits is 423360, while the sum is 48.

The spelling of 561116727831 in words is "five hundred sixty-one billion, one hundred sixteen million, seven hundred twenty-seven thousand, eight hundred thirty-one".