83645879413 has 4 divisors (see below), whose sum is σ = 83649434400. Its totient is φ = 83642324428.

The previous prime is 83645879411. The next prime is 83645879417. The reversal of 83645879413 is 31497854638.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31497854638 = 2 ⋅15748927319.

It is a cyclic number.

It is not a de Polignac number, because 83645879413 - 2¹ = 83645879411 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83645879411) 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, 1741963 + ... + 1789336.

It is an arithmetic number, because the mean of its divisors is an integer number (20912358600).

Almost surely, 2^83645879413 is an apocalyptic number.

It is an amenable number.

83645879413 is a deficient number, since it is larger than the sum of its proper divisors (3554987).

83645879413 is a wasteful number, since it uses less digits than its factorization.

83645879413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554986.

The product of its digits is 17418240, while the sum is 58.

The spelling of 83645879413 in words is "eighty-three billion, six hundred forty-five million, eight hundred seventy-nine thousand, four hundred thirteen".