111642983561 has 2 divisors, whose sum is σ = 111642983562. Its totient is φ = 111642983560.

The previous prime is 111642983467. The next prime is 111642983567. The reversal of 111642983561 is 165389246111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64138601536 + 47504382025 = 253256^2 + 217955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111642983561 is a prime.

It is not a weakly prime, because it can be changed into another prime (111642983567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55821491780 + 55821491781.

It is an arithmetic number, because the mean of its divisors is an integer number (55821491781).

Almost surely, 2^111642983561 is an apocalyptic number.

It is an amenable number.

111642983561 is a deficient number, since it is larger than the sum of its proper divisors (1).

111642983561 is an equidigital number, since it uses as much as digits as its factorization.

111642983561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 47.

The spelling of 111642983561 in words is "one hundred eleven billion, six hundred forty-two million, nine hundred eighty-three thousand, five hundred sixty-one".