1182869887861 has 2 divisors, whose sum is σ = 1182869887862. Its totient is φ = 1182869887860.

The previous prime is 1182869887831. The next prime is 1182869887937. The reversal of 1182869887861 is 1687889682811.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660003508836 + 522866379025 = 812406^2 + 723095^2 .

It is a cyclic number.

It is not a de Polignac number, because 1182869887861 - 2⁹ = 1182869887349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1182869887831) 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, 591434943930 + 591434943931.

It is an arithmetic number, because the mean of its divisors is an integer number (591434943931).

Almost surely, 2^{1182869887861} is an apocalyptic number.

It is an amenable number.

1182869887861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1182869887861 is an equidigital number, since it uses as much as digits as its factorization.

1182869887861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 148635648, while the sum is 73.

The spelling of 1182869887861 in words is "one trillion, one hundred eighty-two billion, eight hundred sixty-nine million, eight hundred eighty-seven thousand, eight hundred sixty-one".