47878217973 has 24 divisors (see below), whose sum is σ = 72180014400. Its totient is φ = 30524376960.

The previous prime is 47878217951. The next prime is 47878217987. The reversal of 47878217973 is 37971287874.

47878217973 is a `hidden beast` number, since 478 + 7 + 8 + 21 + 79 + 73 = 666.

47878217973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47878217973 - 2¹⁶ = 47878152437 is a prime.

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 47878217973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47878217993) 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, 1032813 + ... + 1078173.

It is an arithmetic number, because the mean of its divisors is an integer number (3007500600).

Almost surely, 2^47878217973 is an apocalyptic number.

It is an amenable number.

47878217973 is a deficient number, since it is larger than the sum of its proper divisors (24301796427).

47878217973 is a wasteful number, since it uses less digits than its factorization.

47878217973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50489 (or 50486 counting only the distinct ones).

The product of its digits is 33191424, while the sum is 63.

The spelling of 47878217973 in words is "forty-seven billion, eight hundred seventy-eight million, two hundred seventeen thousand, nine hundred seventy-three".