111009944557 has 2 divisors, whose sum is σ = 111009944558. Its totient is φ = 111009944556.

The previous prime is 111009944503. The next prime is 111009944579. The reversal of 111009944557 is 755449900111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107286382116 + 3723562441 = 327546^2 + 61021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111009944557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111009944957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55504972278 + 55504972279.

It is an arithmetic number, because the mean of its divisors is an integer number (55504972279).

Almost surely, 2^111009944557 is an apocalyptic number.

It is an amenable number.

111009944557 is a deficient number, since it is larger than the sum of its proper divisors (1).

111009944557 is an equidigital number, since it uses as much as digits as its factorization.

111009944557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 46.

The spelling of 111009944557 in words is "one hundred eleven billion, nine million, nine hundred forty-four thousand, five hundred fifty-seven".