1551188791 has 2 divisors, whose sum is σ = 1551188792. Its totient is φ = 1551188790.

The previous prime is 1551188741. The next prime is 1551188803. The reversal of 1551188791 is 1978811551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1551188791 - 2⁷ = 1551188663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1551188741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 775594395 + 775594396.

It is an arithmetic number, because the mean of its divisors is an integer number (775594396).

Almost surely, 2^1551188791 is an apocalyptic number.

1551188791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1551188791 is an equidigital number, since it uses as much as digits as its factorization.

1551188791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 46.

The square root of 1551188791 is about 39385.1341371335. The cubic root of 1551188791 is about 1157.5903186058.

The spelling of 1551188791 in words is "one billion, five hundred fifty-one million, one hundred eighty-eight thousand, seven hundred ninety-one".