9551111551 has 2 divisors, whose sum is σ = 9551111552. Its totient is φ = 9551111550.

The previous prime is 9551111527. The next prime is 9551111569. The reversal of 9551111551 is 1551111559.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9551111551 - 2²⁷ = 9416893823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9551115551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4775555775 + 4775555776.

It is an arithmetic number, because the mean of its divisors is an integer number (4775555776).

Almost surely, 2^9551111551 is an apocalyptic number.

9551111551 is a deficient number, since it is larger than the sum of its proper divisors (1).

9551111551 is an equidigital number, since it uses as much as digits as its factorization.

9551111551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5625, while the sum is 34.

The square root of 9551111551 is about 97729.7884526514. The cubic root of 9551111551 is about 2121.7032377758.

The spelling of 9551111551 in words is "nine billion, five hundred fifty-one million, one hundred eleven thousand, five hundred fifty-one".