15603423361 has 4 divisors (see below), whose sum is σ = 16521271812. Its totient is φ = 14685574912.

The previous prime is 15603423343. The next prime is 15603423397. The reversal of 15603423361 is 16332430651.

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 6301978225 + 9301445136 = 79385^2 + 96444^2 .

It is a cyclic number.

It is not a de Polignac number, because 15603423361 - 2¹¹ = 15603421313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15603423301) 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, 458924200 + ... + 458924233.

It is an arithmetic number, because the mean of its divisors is an integer number (4130317953).

Almost surely, 2^15603423361 is an apocalyptic number.

It is an amenable number.

15603423361 is a deficient number, since it is larger than the sum of its proper divisors (917848451).

15603423361 is an equidigital number, since it uses as much as digits as its factorization.

15603423361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917848450.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 15603423361 in words is "fifteen billion, six hundred three million, four hundred twenty-three thousand, three hundred sixty-one".