111866899489 has 2 divisors, whose sum is σ = 111866899490. Its totient is φ = 111866899488.

The previous prime is 111866899481. The next prime is 111866899523. The reversal of 111866899489 is 984998668111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104221145889 + 7645753600 = 322833^2 + 87440^2 .

It is a cyclic number.

It is not a de Polignac number, because 111866899489 - 2³ = 111866899481 is a prime.

It is a super-2 number, since 2×111866899489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111866899481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55933449744 + 55933449745.

It is an arithmetic number, because the mean of its divisors is an integer number (55933449745).

Almost surely, 2^111866899489 is an apocalyptic number.

It is an amenable number.

111866899489 is a deficient number, since it is larger than the sum of its proper divisors (1).

111866899489 is an equidigital number, since it uses as much as digits as its factorization.

111866899489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53747712, while the sum is 70.

The spelling of 111866899489 in words is "one hundred eleven billion, eight hundred sixty-six million, eight hundred ninety-nine thousand, four hundred eighty-nine".