11281997717 has 4 divisors (see below), whose sum is σ = 11387437056. Its totient is φ = 11176558380.

The previous prime is 11281997653. The next prime is 11281997729. The reversal of 11281997717 is 71779918211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11281997717 - 2⁶ = 11281997653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11281927717) 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, 52719509 + ... + 52719722.

It is an arithmetic number, because the mean of its divisors is an integer number (2846859264).

Almost surely, 2^11281997717 is an apocalyptic number.

It is an amenable number.

11281997717 is a deficient number, since it is larger than the sum of its proper divisors (105439339).

11281997717 is a wasteful number, since it uses less digits than its factorization.

11281997717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105439338.

The product of its digits is 444528, while the sum is 53.

The spelling of 11281997717 in words is "eleven billion, two hundred eighty-one million, nine hundred ninety-seven thousand, seven hundred seventeen".