1188365684461 has 2 divisors, whose sum is σ = 1188365684462. Its totient is φ = 1188365684460.

The previous prime is 1188365684411. The next prime is 1188365684477. The reversal of 1188365684461 is 1644865638811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874844079561 + 313521604900 = 935331^2 + 559930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1188365684461 - 2⁹ = 1188365683949 is a prime.

It is a super-2 number, since 2×1188365684461² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1188365684461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1188365684411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 594182842230 + 594182842231.

It is an arithmetic number, because the mean of its divisors is an integer number (594182842231).

Almost surely, 2^{1188365684461} is an apocalyptic number.

It is an amenable number.

1188365684461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1188365684461 is an equidigital number, since it uses as much as digits as its factorization.

1188365684461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26542080, while the sum is 61.

The spelling of 1188365684461 in words is "one trillion, one hundred eighty-eight billion, three hundred sixty-five million, six hundred eighty-four thousand, four hundred sixty-one".