1187111577667 has 2 divisors, whose sum is σ = 1187111577668. Its totient is φ = 1187111577666.

The previous prime is 1187111577653. The next prime is 1187111577689. The reversal of 1187111577667 is 7667751117811.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1187111577667 - 2³⁵ = 1152751839299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1187111577607) 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, 593555788833 + 593555788834.

It is an arithmetic number, because the mean of its divisors is an integer number (593555788834).

Almost surely, 2^{1187111577667} is an apocalyptic number.

1187111577667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187111577667 is an equidigital number, since it uses as much as digits as its factorization.

1187111577667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3457440, while the sum is 58.

The spelling of 1187111577667 in words is "one trillion, one hundred eighty-seven billion, one hundred eleven million, five hundred seventy-seven thousand, six hundred sixty-seven".