561111117166 has 8 divisors (see below), whose sum is σ = 851123604960. Its totient is φ = 277403248848.

The previous prime is 561111117163. The next prime is 561111117169. The reversal of 561111117166 is 661711111165.

It is an interprime number because it is at equal distance from previous prime (561111117163) and next prime (561111117169).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561111117163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1576154646 + ... + 1576155001.

It is an arithmetic number, because the mean of its divisors is an integer number (106390450620).

Almost surely, 2^561111117166 is an apocalyptic number.

561111117166 is a deficient number, since it is larger than the sum of its proper divisors (290012487794).

561111117166 is a wasteful number, since it uses less digits than its factorization.

561111117166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3152309738.

The product of its digits is 7560, while the sum is 37.

The spelling of 561111117166 in words is "five hundred sixty-one billion, one hundred eleven million, one hundred seventeen thousand, one hundred sixty-six".