55011109943 has 2 divisors, whose sum is σ = 55011109944. Its totient is φ = 55011109942.

The previous prime is 55011109921. The next prime is 55011109991. The reversal of 55011109943 is 34990111055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55011109943 - 2¹² = 55011105847 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 55011109897 and 55011109906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55011100943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27505554971 + 27505554972.

It is an arithmetic number, because the mean of its divisors is an integer number (27505554972).

Almost surely, 2^55011109943 is an apocalyptic number.

55011109943 is a deficient number, since it is larger than the sum of its proper divisors (1).

55011109943 is an equidigital number, since it uses as much as digits as its factorization.

55011109943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 38.

The spelling of 55011109943 in words is "fifty-five billion, eleven million, one hundred nine thousand, nine hundred forty-three".