1163645685 has 24 divisors (see below), whose sum is σ = 2020897944. Its totient is φ = 619407360.

The previous prime is 1163645683. The next prime is 1163645759. The reversal of 1163645685 is 5865463611.

1163645685 is a `hidden beast` number, since 1 + 1 + 636 + 4 + 5 + 6 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 6081156 + 1157564529 = 2466^2 + 34023^2 .

It is not a de Polignac number, because 1163645685 - 2¹ = 1163645683 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1163645685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1163645683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1372 + ... + 48261.

It is an arithmetic number, because the mean of its divisors is an integer number (84204081).

Almost surely, 2^1163645685 is an apocalyptic number.

1163645685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1163645685 is a deficient number, since it is larger than the sum of its proper divisors (857252259).

1163645685 is a wasteful number, since it uses less digits than its factorization.

1163645685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50165 (or 50162 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 1163645685 is about 34112.2512449706. The cubic root of 1163645685 is about 1051.8171662603.

The spelling of 1163645685 in words is "one billion, one hundred sixty-three million, six hundred forty-five thousand, six hundred eighty-five".