84171752539 has 4 divisors (see below), whose sum is σ = 96196288624. Its totient is φ = 72147216456.

The previous prime is 84171752527. The next prime is 84171752563. The reversal of 84171752539 is 93525717148.

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

It is not a de Polignac number, because 84171752539 - 2¹¹ = 84171750491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84171752519) 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, 6012268032 + ... + 6012268045.

It is an arithmetic number, because the mean of its divisors is an integer number (24049072156).

Almost surely, 2^84171752539 is an apocalyptic number.

84171752539 is a deficient number, since it is larger than the sum of its proper divisors (12024536085).

84171752539 is a wasteful number, since it uses less digits than its factorization.

84171752539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12024536084.

The product of its digits is 2116800, while the sum is 52.

The spelling of 84171752539 in words is "eighty-four billion, one hundred seventy-one million, seven hundred fifty-two thousand, five hundred thirty-nine".