13635441623 has 4 divisors (see below), whose sum is σ = 13692493920. Its totient is φ = 13578389328.

The previous prime is 13635441581. The next prime is 13635441649. The reversal of 13635441623 is 32614453631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32614453631 = 421 ⋅77469011.

It is a cyclic number.

It is not a de Polignac number, because 13635441623 - 2⁸ = 13635441367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13635441653) 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, 28525790 + ... + 28526267.

It is an arithmetic number, because the mean of its divisors is an integer number (3423123480).

Almost surely, 2^13635441623 is an apocalyptic number.

13635441623 is a deficient number, since it is larger than the sum of its proper divisors (57052297).

13635441623 is an equidigital number, since it uses as much as digits as its factorization.

13635441623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57052296.

The product of its digits is 155520, while the sum is 38.

The spelling of 13635441623 in words is "thirteen billion, six hundred thirty-five million, four hundred forty-one thousand, six hundred twenty-three".