53438685847 has 4 divisors (see below), whose sum is σ = 56251248280. Its totient is φ = 50626123416.

The previous prime is 53438685827. The next prime is 53438685871. The reversal of 53438685847 is 74858683435.

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

It is a cyclic number.

It is not a de Polignac number, because 53438685847 - 2³¹ = 51291202199 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 (53438685827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406281188 + ... + 1406281225.

It is an arithmetic number, because the mean of its divisors is an integer number (14062812070).

Almost surely, 2^53438685847 is an apocalyptic number.

53438685847 is a deficient number, since it is larger than the sum of its proper divisors (2812562433).

53438685847 is a wasteful number, since it uses less digits than its factorization.

53438685847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812562432.

The product of its digits is 77414400, while the sum is 61.

The spelling of 53438685847 in words is "fifty-three billion, four hundred thirty-eight million, six hundred eighty-five thousand, eight hundred forty-seven".