111961100849 has 6 divisors (see below), whose sum is σ = 121235985126. Its totient is φ = 103348708320.

The previous prime is 111961100813. The next prime is 111961100897. The reversal of 111961100849 is 948001169111.

It can be written as a sum of positive squares in 3 ways, for example, as 10620745249 + 101340355600 = 103057^2 + 318340^2 .

It is not a de Polignac number, because 111961100849 - 2⁸ = 111961100593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111961100809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331245692 + ... + 331246029.

It is an arithmetic number, because the mean of its divisors is an integer number (20205997521).

Almost surely, 2^111961100849 is an apocalyptic number.

It is an amenable number.

111961100849 is a deficient number, since it is larger than the sum of its proper divisors (9274884277).

111961100849 is an equidigital number, since it uses as much as digits as its factorization.

111961100849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662491747 (or 662491734 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 41.

The spelling of 111961100849 in words is "one hundred eleven billion, nine hundred sixty-one million, one hundred thousand, eight hundred forty-nine".