11931056717 has 4 divisors (see below), whose sum is σ = 11931934656. Its totient is φ = 11930178780.

The previous prime is 11931056701. The next prime is 11931056729. The reversal of 11931056717 is 71765013911.

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 11931056717 - 2⁴ = 11931056701 is a prime.

It is a super-2 number, since 2×11931056717² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11921056717) 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, 418259 + ... + 445872.

It is an arithmetic number, because the mean of its divisors is an integer number (2982983664).

Almost surely, 2^11931056717 is an apocalyptic number.

It is an amenable number.

11931056717 is a deficient number, since it is larger than the sum of its proper divisors (877939).

11931056717 is an equidigital number, since it uses as much as digits as its factorization.

11931056717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877938.

The product of its (nonzero) digits is 39690, while the sum is 41.

The spelling of 11931056717 in words is "eleven billion, nine hundred thirty-one million, fifty-six thousand, seven hundred seventeen".