83565856538 has 4 divisors (see below), whose sum is σ = 125348784810. Its totient is φ = 41782928268.

The previous prime is 83565856529. The next prime is 83565856571.

83565856538 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in only one way, i.e., 83351731849 + 214124689 = 288707^2 + 14633^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20891464133 + ... + 20891464136.

Almost surely, 2^83565856538 is an apocalyptic number.

83565856538 is a deficient number, since it is larger than the sum of its proper divisors (41782928272).

83565856538 is a wasteful number, since it uses less digits than its factorization.

83565856538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41782928271.

The product of its digits is 103680000, while the sum is 62.

The spelling of 83565856538 in words is "eighty-three billion, five hundred sixty-five million, eight hundred fifty-six thousand, five hundred thirty-eight".