13859021725 has 6 divisors (see below), whose sum is σ = 17185186970. Its totient is φ = 11087217360.

The previous prime is 13859021723. The next prime is 13859021753. The reversal of 13859021725 is 52712095831.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 146845924 + 13712175801 = 12118^2 + 117099^2 .

It is not a de Polignac number, because 13859021725 - 2¹ = 13859021723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13859021723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277180410 + ... + 277180459.

Almost surely, 2^13859021725 is an apocalyptic number.

It is an amenable number.

13859021725 is a deficient number, since it is larger than the sum of its proper divisors (3326165245).

13859021725 is an equidigital number, since it uses as much as digits as its factorization.

13859021725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554360879 (or 554360874 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 13859021725 in words is "thirteen billion, eight hundred fifty-nine million, twenty-one thousand, seven hundred twenty-five".