47857145291 has 4 divisors (see below), whose sum is σ = 47875491000. Its totient is φ = 47838799584.

The previous prime is 47857145269. The next prime is 47857145293. The reversal of 47857145291 is 19254175874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19254175874 = 2 ⋅9627087937.

It is a cyclic number.

It is not a de Polignac number, because 47857145291 - 2¹⁸ = 47856883147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47857145293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9168941 + ... + 9174158.

It is an arithmetic number, because the mean of its divisors is an integer number (11968872750).

Almost surely, 2^47857145291 is an apocalyptic number.

47857145291 is a deficient number, since it is larger than the sum of its proper divisors (18345709).

47857145291 is a wasteful number, since it uses less digits than its factorization.

47857145291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18345708.

The product of its digits is 2822400, while the sum is 53.

The spelling of 47857145291 in words is "forty-seven billion, eight hundred fifty-seven million, one hundred forty-five thousand, two hundred ninety-one".