11640855447 has 12 divisors (see below), whose sum is σ = 18107997544. Its totient is φ = 7163603280.

The previous prime is 11640855431. The next prime is 11640855463. The reversal of 11640855447 is 74455804611.

11640855447 is a `hidden beast` number, since 1 + 16 + 40 + 8 + 554 + 47 = 666.

It is an interprime number because it is at equal distance from previous prime (11640855431) and next prime (11640855463).

It is not a de Polignac number, because 11640855447 - 2⁴ = 11640855431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640855487) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49747129 + ... + 49747362.

Almost surely, 2^11640855447 is an apocalyptic number.

11640855447 is a deficient number, since it is larger than the sum of its proper divisors (6467142097).

11640855447 is a wasteful number, since it uses less digits than its factorization.

11640855447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99494510 (or 99494507 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 11640855447 in words is "eleven billion, six hundred forty million, eight hundred fifty-five thousand, four hundred forty-seven".