1194259499891 has 2 divisors, whose sum is σ = 1194259499892. Its totient is φ = 1194259499890.

The previous prime is 1194259499887. The next prime is 1194259499903. The reversal of 1194259499891 is 1989949524911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1194259499891 - 2² = 1194259499887 is a prime.

It is not a weakly prime, because it can be changed into another prime (1194259499791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 597129749945 + 597129749946.

It is an arithmetic number, because the mean of its divisors is an integer number (597129749946).

Almost surely, 2^{1194259499891} is an apocalyptic number.

1194259499891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1194259499891 is an equidigital number, since it uses as much as digits as its factorization.

1194259499891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75582720, while the sum is 71.

The spelling of 1194259499891 in words is "one trillion, one hundred ninety-four billion, two hundred fifty-nine million, four hundred ninety-nine thousand, eight hundred ninety-one".