11816668645 has 16 divisors (see below), whose sum is σ = 14303490048. Its totient is φ = 9371134080.

The previous prime is 11816668627. The next prime is 11816668667. The reversal of 11816668645 is 54686661811.

It is not a de Polignac number, because 11816668645 - 2¹¹ = 11816666597 is a prime.

It is a super-2 number, since 2×11816668645² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11816668592 and 11816668601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 831792 + ... + 845878.

It is an arithmetic number, because the mean of its divisors is an integer number (893968128).

Almost surely, 2^11816668645 is an apocalyptic number.

It is an amenable number.

11816668645 is a deficient number, since it is larger than the sum of its proper divisors (2486821403).

11816668645 is a wasteful number, since it uses less digits than its factorization.

11816668645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15540.

The product of its digits is 1658880, while the sum is 52.

The spelling of 11816668645 in words is "eleven billion, eight hundred sixteen million, six hundred sixty-eight thousand, six hundred forty-five".