11291982817 has 4 divisors (see below), whose sum is σ = 11293046020. Its totient is φ = 11290919616.

The previous prime is 11291982799. The next prime is 11291982847. The reversal of 11291982817 is 71828919211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71828919211 = 7 ⋅10261274173.

It can be written as a sum of positive squares in 2 ways, for example, as 4130761441 + 7161221376 = 64271^2 + 84624^2 .

It is a cyclic number.

It is not a de Polignac number, because 11291982817 - 2²⁷ = 11157765089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11291982847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515508 + ... + 536965.

It is an arithmetic number, because the mean of its divisors is an integer number (2823261505).

Almost surely, 2^11291982817 is an apocalyptic number.

It is an amenable number.

11291982817 is a deficient number, since it is larger than the sum of its proper divisors (1063203).

11291982817 is a wasteful number, since it uses less digits than its factorization.

11291982817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063202.

The product of its digits is 145152, while the sum is 49.

The spelling of 11291982817 in words is "eleven billion, two hundred ninety-one million, nine hundred eighty-two thousand, eight hundred seventeen".