83861113561 has 4 divisors (see below), whose sum is σ = 88274856400. Its totient is φ = 79447370724.

The previous prime is 83861113549. The next prime is 83861113601. The reversal of 83861113561 is 16531116838.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 83861113561 - 2¹¹ = 83861111513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83861110561) 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, 2206871391 + ... + 2206871428.

It is an arithmetic number, because the mean of its divisors is an integer number (22068714100).

Almost surely, 2^83861113561 is an apocalyptic number.

It is an amenable number.

83861113561 is a deficient number, since it is larger than the sum of its proper divisors (4413742839).

83861113561 is a wasteful number, since it uses less digits than its factorization.

83861113561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4413742838.

The product of its digits is 103680, while the sum is 43.

The spelling of 83861113561 in words is "eighty-three billion, eight hundred sixty-one million, one hundred thirteen thousand, five hundred sixty-one".