11288166885 has 40 divisors (see below), whose sum is σ = 20308337016. Its totient is φ = 5998561920.

The previous prime is 11288166881. The next prime is 11288166899. The reversal of 11288166885 is 58866188211.

It can be written as a sum of positive squares in 4 ways, for example, as 1659258756 + 9628908129 = 40734^2 + 98127^2 .

It is not a de Polignac number, because 11288166885 - 2² = 11288166881 is a prime.

It is a super-2 number, since 2×11288166885² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11288166881) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 61875 + ... + 162495.

Almost surely, 2^11288166885 is an apocalyptic number.

11288166885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11288166885 is a deficient number, since it is larger than the sum of its proper divisors (9020170131).

11288166885 is a wasteful number, since it uses less digits than its factorization.

11288166885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100915 (or 100906 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 54.

The spelling of 11288166885 in words is "eleven billion, two hundred eighty-eight million, one hundred sixty-six thousand, eight hundred eighty-five".