52042478591 has 4 divisors (see below), whose sum is σ = 52042943400. Its totient is φ = 52042013784.

The previous prime is 52042478581. The next prime is 52042478611. The reversal of 52042478591 is 19587424025.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52042478591 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 (52042478581) 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, 49640 + ... + 326418.

It is an arithmetic number, because the mean of its divisors is an integer number (13010735850).

Almost surely, 2^52042478591 is an apocalyptic number.

52042478591 is a deficient number, since it is larger than the sum of its proper divisors (464809).

52042478591 is a wasteful number, since it uses less digits than its factorization.

52042478591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464808.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 52042478591 in words is "fifty-two billion, forty-two million, four hundred seventy-eight thousand, five hundred ninety-one".