83856258851 has 4 divisors (see below), whose sum is σ = 85107844872. Its totient is φ = 82604672832.

The previous prime is 83856258841. The next prime is 83856258859. The reversal of 83856258851 is 15885265838.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83856258851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83856258859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 625792910 + ... + 625793043.

It is an arithmetic number, because the mean of its divisors is an integer number (21276961218).

Almost surely, 2^83856258851 is an apocalyptic number.

83856258851 is a deficient number, since it is larger than the sum of its proper divisors (1251586021).

83856258851 is a wasteful number, since it uses less digits than its factorization.

83856258851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251586020.

The product of its digits is 18432000, while the sum is 59.

The spelling of 83856258851 in words is "eighty-three billion, eight hundred fifty-six million, two hundred fifty-eight thousand, eight hundred fifty-one".