13848665645 has 4 divisors (see below), whose sum is σ = 16618398780. Its totient is φ = 11078932512.

The previous prime is 13848665629. The next prime is 13848665669. The reversal of 13848665645 is 54656684831.

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 6411845476 + 7436820169 = 80074^2 + 86237^2 .

It is a cyclic number.

It is not a de Polignac number, because 13848665645 - 2⁴ = 13848665629 is a prime.

It is a super-3 number, since 3×13848665645³ (a number of 31 digits) contains 333 as substring.

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, 1384866560 + ... + 1384866569.

It is an arithmetic number, because the mean of its divisors is an integer number (4154599695).

Almost surely, 2^13848665645 is an apocalyptic number.

It is an amenable number.

13848665645 is a deficient number, since it is larger than the sum of its proper divisors (2769733135).

13848665645 is an equidigital number, since it uses as much as digits as its factorization.

13848665645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769733134.

The product of its digits is 16588800, while the sum is 56.

The spelling of 13848665645 in words is "thirteen billion, eight hundred forty-eight million, six hundred sixty-five thousand, six hundred forty-five".