47168288657721 has 24 divisors (see below), whose sum is σ = 84943757930304. Its totient is φ = 24503007094560.

The previous prime is 47168288657563. The next prime is 47168288657723. The reversal of 47168288657721 is 12775688286174.

47168288657721 is a `hidden beast` number, since 4 + 7 + 1 + 6 + 8 + 28 + 8 + 6 + 577 + 21 = 666.

It is not a de Polignac number, because 47168288657721 - 2¹⁷ = 47168288526649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47168288657721.

It is not an unprimeable number, because it can be changed into a prime (47168288657723) 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, 34031953606 + ... + 34031954991.

It is an arithmetic number, because the mean of its divisors is an integer number (3539323247096).

Almost surely, 2^{47168288657721} is an apocalyptic number.

It is an amenable number.

47168288657721 is a deficient number, since it is larger than the sum of its proper divisors (37775469272583).

47168288657721 is a wasteful number, since it uses less digits than its factorization.

47168288657721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68063908621 (or 68063908618 counting only the distinct ones).

The product of its digits is 505774080, while the sum is 72.

The spelling of 47168288657721 in words is "forty-seven trillion, one hundred sixty-eight billion, two hundred eighty-eight million, six hundred fifty-seven thousand, seven hundred twenty-one".