1187111670461 has 2 divisors, whose sum is σ = 1187111670462. Its totient is φ = 1187111670460.

The previous prime is 1187111670439. The next prime is 1187111670473. The reversal of 1187111670461 is 1640761117811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1019191202500 + 167920467961 = 1009550^2 + 409781^2 .

It is an emirp because it is prime and its reverse (1640761117811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1187111670461 - 2⁶ = 1187111670397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1187111670061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593555835230 + 593555835231.

It is an arithmetic number, because the mean of its divisors is an integer number (593555835231).

Almost surely, 2^{1187111670461} is an apocalyptic number.

It is an amenable number.

1187111670461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187111670461 is an equidigital number, since it uses as much as digits as its factorization.

1187111670461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 44.

The spelling of 1187111670461 in words is "one trillion, one hundred eighty-seven billion, one hundred eleven million, six hundred seventy thousand, four hundred sixty-one".