111443661629 has 2 divisors, whose sum is σ = 111443661630. Its totient is φ = 111443661628.

The previous prime is 111443661601. The next prime is 111443661631. The reversal of 111443661629 is 926166344111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108903300025 + 2540361604 = 330005^2 + 50402^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111443661629 is a prime.

It is a Sophie Germain prime.

Together with 111443661631, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111443661629.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111443661029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55721830814 + 55721830815.

It is an arithmetic number, because the mean of its divisors is an integer number (55721830815).

Almost surely, 2^111443661629 is an apocalyptic number.

It is an amenable number.

111443661629 is a deficient number, since it is larger than the sum of its proper divisors (1).

111443661629 is an equidigital number, since it uses as much as digits as its factorization.

111443661629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The spelling of 111443661629 in words is "one hundred eleven billion, four hundred forty-three million, six hundred sixty-one thousand, six hundred twenty-nine".