1291161319943 has 8 divisors (see below), whose sum is σ = 1491394893840. Its totient is φ = 1104736958080.

The previous prime is 1291161319933. The next prime is 1291161319949. The reversal of 1291161319943 is 3499131611921.

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

It is a cyclic number.

It is not a de Polignac number, because 1291161319943 - 2¹⁶ = 1291161254407 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1291161319891 and 1291161319900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291161319949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3452302808 + ... + 3452303181.

It is an arithmetic number, because the mean of its divisors is an integer number (186424361730).

Almost surely, 2^{1291161319943} is an apocalyptic number.

1291161319943 is a deficient number, since it is larger than the sum of its proper divisors (200233573897).

1291161319943 is a wasteful number, since it uses less digits than its factorization.

1291161319943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6904606017.

The product of its digits is 314928, while the sum is 50.

The spelling of 1291161319943 in words is "one trillion, two hundred ninety-one billion, one hundred sixty-one million, three hundred nineteen thousand, nine hundred forty-three".