111944165854690 has 64 divisors (see below), whose sum is σ = 221171214985056. Its totient is φ = 40539156682752.

The previous prime is 111944165854621. The next prime is 111944165854733. The reversal of 111944165854690 is 96458561449111.

It is a Cunningham number, because it is equal to 10580367²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 16559780335641 + 95384385519049 = 4069371^2 + 9766493^2 .

It is a super-2 number, since 2×111944165854690² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16841304 + ... + 22528156.

Almost surely, 2^{111944165854690} is an apocalyptic number.

111944165854690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111944165854690 is a deficient number, since it is larger than the sum of its proper divisors (109227049130366).

111944165854690 is a wasteful number, since it uses less digits than its factorization.

111944165854690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689783.

The product of its (nonzero) digits is 37324800, while the sum is 64.

The spelling of 111944165854690 in words is "one hundred eleven trillion, nine hundred forty-four billion, one hundred sixty-five million, eight hundred fifty-four thousand, six hundred ninety".