83318567405 has 4 divisors (see below), whose sum is σ = 99982280892. Its totient is φ = 66654853920.

The previous prime is 83318567393. The next prime is 83318567441. The reversal of 83318567405 is 50476581338.

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 37480185604 + 45838381801 = 193598^2 + 214099^2 .

It is not a de Polignac number, because 83318567405 - 2¹⁰ = 83318566381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8331856736 + ... + 8331856745.

It is an arithmetic number, because the mean of its divisors is an integer number (24995570223).

Almost surely, 2^83318567405 is an apocalyptic number.

It is an amenable number.

83318567405 is a deficient number, since it is larger than the sum of its proper divisors (16663713487).

83318567405 is a wasteful number, since it uses less digits than its factorization.

83318567405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16663713486.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 83318567405 in words is "eighty-three billion, three hundred eighteen million, five hundred sixty-seven thousand, four hundred five".