11694475881 has 81 divisors (see below), whose sum is σ = 19401269797. Its totient is φ = 6782603520.

The previous prime is 11694475873. The next prime is 11694475883. The reversal of 11694475881 is 18857449611.

The square root of 11694475881 is 108141.

It is a perfect power (a square), and thus also a powerful number.

11694475881 is a `hidden beast` number, since 1 + 1 + 6 + 94 + 475 + 8 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4035425625 + 7659050256 = 63525^2 + 87516^2 .

It is not a de Polignac number, because 11694475881 - 2³ = 11694475873 is a prime.

It is a super-2 number, since 2×11694475881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11694475883) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 103490881 + ... + 103490993.

Almost surely, 2^11694475881 is an apocalyptic number.

11694475881 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11694475881 is the 108141-st square number.

11694475881 is the 54071-st centered octagonal number.

It is an amenable number.

11694475881 is a deficient number, since it is larger than the sum of its proper divisors (7706793916).

11694475881 is a wasteful number, since it uses less digits than its factorization.

11694475881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 156 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 54.

The spelling of 11694475881 in words is "eleven billion, six hundred ninety-four million, four hundred seventy-five thousand, eight hundred eighty-one".