247880043855 has 56 divisors (see below), whose sum is σ = 446117393520. Its totient is φ = 132161984640.

The previous prime is 247880043841. The next prime is 247880043911. The reversal of 247880043855 is 558340088742.

247880043855 is a `hidden beast` number, since 2 + 478 + 80 + 0 + 43 + 8 + 55 = 666.

It is not a de Polignac number, because 247880043855 - 2⁷ = 247880043727 is a prime.

It is a super-2 number, since 2×247880043855² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 14640795 + ... + 14657715.

Almost surely, 2^247880043855 is an apocalyptic number.

247880043855 is a deficient number, since it is larger than the sum of its proper divisors (198237349665).

247880043855 is an equidigital number, since it uses as much as digits as its factorization.

247880043855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20963 (or 20948 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 247880043855 in words is "two hundred forty-seven billion, eight hundred eighty million, forty-three thousand, eight hundred fifty-five".