1186617931649 has 2 divisors, whose sum is σ = 1186617931650. Its totient is φ = 1186617931648.

The previous prime is 1186617931591. The next prime is 1186617931657. The reversal of 1186617931649 is 9461397166811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 668253931024 + 518364000625 = 817468^2 + 719975^2 .

It is a cyclic number.

It is not a de Polignac number, because 1186617931649 - 2⁸ = 1186617931393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1186617931591 and 1186617931600.

It is not a weakly prime, because it can be changed into another prime (1186617231649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593308965824 + 593308965825.

It is an arithmetic number, because the mean of its divisors is an integer number (593308965825).

Almost surely, 2^{1186617931649} is an apocalyptic number.

It is an amenable number.

1186617931649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1186617931649 is an equidigital number, since it uses as much as digits as its factorization.

1186617931649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 62.

The spelling of 1186617931649 in words is "one trillion, one hundred eighty-six billion, six hundred seventeen million, nine hundred thirty-one thousand, six hundred forty-nine".