83867524985 has 4 divisors (see below), whose sum is σ = 100641029988. Its totient is φ = 67094019984.

The previous prime is 83867524981. The next prime is 83867524987. The reversal of 83867524985 is 58942576838.

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 48506979049 + 35360545936 = 220243^2 + 188044^2 .

It is a cyclic number.

It is not a de Polignac number, because 83867524985 - 2² = 83867524981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83867524981) 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, 8386752494 + ... + 8386752503.

It is an arithmetic number, because the mean of its divisors is an integer number (25160257497).

Almost surely, 2^83867524985 is an apocalyptic number.

It is an amenable number.

83867524985 is a deficient number, since it is larger than the sum of its proper divisors (16773505003).

83867524985 is a wasteful number, since it uses less digits than its factorization.

83867524985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16773505002.

The product of its digits is 116121600, while the sum is 65.

The spelling of 83867524985 in words is "eighty-three billion, eight hundred sixty-seven million, five hundred twenty-four thousand, nine hundred eighty-five".