5556111091 has 2 divisors, whose sum is σ = 5556111092. Its totient is φ = 5556111090.

The previous prime is 5556111089. The next prime is 5556111107. The reversal of 5556111091 is 1901116555.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5556111091 - 2¹ = 5556111089 is a prime.

Together with 5556111089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5556111191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2778055545 + 2778055546.

It is an arithmetic number, because the mean of its divisors is an integer number (2778055546).

Almost surely, 2^5556111091 is an apocalyptic number.

5556111091 is a deficient number, since it is larger than the sum of its proper divisors (1).

5556111091 is an equidigital number, since it uses as much as digits as its factorization.

5556111091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6750, while the sum is 34.

The square root of 5556111091 is about 74539.3258018880. The cubic root of 5556111091 is about 1771.1566477868.

The spelling of 5556111091 in words is "five billion, five hundred fifty-six million, one hundred eleven thousand, ninety-one".