47878217971 has 16 divisors (see below), whose sum is σ = 53372541600. Its totient is φ = 42682318848.

The previous prime is 47878217951. The next prime is 47878217987. The reversal of 47878217971 is 17971287874.

47878217971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 47878217971 - 2⁹ = 47878217459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47878217951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2409051 + ... + 2428843.

It is an arithmetic number, because the mean of its divisors is an integer number (3335783850).

Almost surely, 2^47878217971 is an apocalyptic number.

47878217971 is a deficient number, since it is larger than the sum of its proper divisors (5494323629).

47878217971 is a wasteful number, since it uses less digits than its factorization.

47878217971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27318.

The product of its digits is 11063808, while the sum is 61.

The spelling of 47878217971 in words is "forty-seven billion, eight hundred seventy-eight million, two hundred seventeen thousand, nine hundred seventy-one".