11661324345 has 96 divisors (see below), whose sum is σ = 22657549824. Its totient is φ = 5499187200.

The previous prime is 11661324341. The next prime is 11661324349. The reversal of 11661324345 is 54342316611.

11661324345 is a `hidden beast` number, since 1 + 1 + 6 + 613 + 2 + 4 + 34 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (11661324341) and next prime (11661324349).

It is not a de Polignac number, because 11661324345 - 2² = 11661324341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11661324341) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8787072 + ... + 8788398.

It is an arithmetic number, because the mean of its divisors is an integer number (236016144).

Almost surely, 2^11661324345 is an apocalyptic number.

11661324345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11661324345 is a deficient number, since it is larger than the sum of its proper divisors (10996225479).

11661324345 is a wasteful number, since it uses less digits than its factorization.

11661324345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1820 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 11661324345 in words is "eleven billion, six hundred sixty-one million, three hundred twenty-four thousand, three hundred forty-five".