47867939219557 has 4 divisors (see below), whose sum is σ = 48291549301260. Its totient is φ = 47444329137856.

The previous prime is 47867939219543. The next prime is 47867939219587. The reversal of 47867939219557 is 75591293976874.

It is a Cunningham number, because it is equal to 6918666²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 843469580836 + 47024469638721 = 918406^2 + 6857439^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47867939219557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47867939219587) 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, 211805040682 + ... + 211805040907.

It is an arithmetic number, because the mean of its divisors is an integer number (12072887325315).

Almost surely, 2^{47867939219557} is an apocalyptic number.

It is an amenable number.

47867939219557 is a deficient number, since it is larger than the sum of its proper divisors (423610081703).

47867939219557 is a wasteful number, since it uses less digits than its factorization.

47867939219557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423610081702.

The product of its digits is 7201353600, while the sum is 82.

The spelling of 47867939219557 in words is "forty-seven trillion, eight hundred sixty-seven billion, nine hundred thirty-nine million, two hundred nineteen thousand, five hundred fifty-seven".