1291792916811 has 8 divisors (see below), whose sum is σ = 1727501508304. Its totient is φ = 858639801600.

The previous prime is 1291792916807. The next prime is 1291792916837. The reversal of 1291792916811 is 1186192971921.

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

It is not a de Polignac number, because 1291792916811 - 2² = 1291792916807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1291792916801) 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, 638867890 + ... + 638869911.

It is an arithmetic number, because the mean of its divisors is an integer number (215937688538).

Almost surely, 2^{1291792916811} is an apocalyptic number.

1291792916811 is a deficient number, since it is larger than the sum of its proper divisors (435708591493).

1291792916811 is a wasteful number, since it uses less digits than its factorization.

1291792916811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277738141.

The product of its digits is 979776, while the sum is 57.

The spelling of 1291792916811 in words is "one trillion, two hundred ninety-one billion, seven hundred ninety-two million, nine hundred sixteen thousand, eight hundred eleven".