83691083855 has 4 divisors (see below), whose sum is σ = 100429300632. Its totient is φ = 66952867080.

The previous prime is 83691083851. The next prime is 83691083921. The reversal of 83691083855 is 55838019638.

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

It is not a de Polignac number, because 83691083855 - 2² = 83691083851 is a prime.

It is a super-2 number, since 2×83691083855² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 83691083855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83691083851) 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, 8369108381 + ... + 8369108390.

It is an arithmetic number, because the mean of its divisors is an integer number (25107325158).

Almost surely, 2^83691083855 is an apocalyptic number.

83691083855 is a deficient number, since it is larger than the sum of its proper divisors (16738216777).

83691083855 is a wasteful number, since it uses less digits than its factorization.

83691083855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16738216776.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 83691083855 in words is "eighty-three billion, six hundred ninety-one million, eighty-three thousand, eight hundred fifty-five".