1188164131591 has 2 divisors, whose sum is σ = 1188164131592. Its totient is φ = 1188164131590.

The previous prime is 1188164131523. The next prime is 1188164131657. The reversal of 1188164131591 is 1951314618811.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1951314618811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1188164131591 - 2⁹ = 1188164131079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188164131501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594082065795 + 594082065796.

It is an arithmetic number, because the mean of its divisors is an integer number (594082065796).

Almost surely, 2^{1188164131591} is an apocalyptic number.

1188164131591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188164131591 is an equidigital number, since it uses as much as digits as its factorization.

1188164131591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 49.

The spelling of 1188164131591 in words is "one trillion, one hundred eighty-eight billion, one hundred sixty-four million, one hundred thirty-one thousand, five hundred ninety-one".