11111772717 has 48 divisors (see below), whose sum is σ = 17614808640. Its totient is φ = 6725182464.

The previous prime is 11111772709. The next prime is 11111772739. The reversal of 11111772717 is 71727711111.

It is not a de Polignac number, because 11111772717 - 2³ = 11111772709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111772757) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 375453 + ... + 403965.

It is an arithmetic number, because the mean of its divisors is an integer number (366975180).

Almost surely, 2^11111772717 is an apocalyptic number.

It is an amenable number.

11111772717 is a deficient number, since it is larger than the sum of its proper divisors (6503035923).

11111772717 is a wasteful number, since it uses less digits than its factorization.

11111772717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28634 (or 28631 counting only the distinct ones).

The product of its digits is 4802, while the sum is 36.

The spelling of 11111772717 in words is "eleven billion, one hundred eleven million, seven hundred seventy-two thousand, seven hundred seventeen".