1291161319894 has 8 divisors (see below), whose sum is σ = 1942929654840. Its totient is φ = 643518101616.

The previous prime is 1291161319859. The next prime is 1291161319897. The reversal of 1291161319894 is 4989131611921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291161319897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1031278384 + ... + 1031279635.

It is an arithmetic number, because the mean of its divisors is an integer number (242866206855).

Almost surely, 2^{1291161319894} is an apocalyptic number.

1291161319894 is a deficient number, since it is larger than the sum of its proper divisors (651768334946).

1291161319894 is a wasteful number, since it uses less digits than its factorization.

1291161319894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062558334.

The product of its digits is 839808, while the sum is 55.

The spelling of 1291161319894 in words is "one trillion, two hundred ninety-one billion, one hundred sixty-one million, three hundred nineteen thousand, eight hundred ninety-four".