12603345409 has 4 divisors (see below), whose sum is σ = 12943976404. Its totient is φ = 12262714416.

The previous prime is 12603345383. The next prime is 12603345467. The reversal of 12603345409 is 90454330621.

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 5248567809 + 7354777600 = 72447^2 + 85760^2 .

It is a cyclic number.

It is not a de Polignac number, because 12603345409 - 2¹⁵ = 12603312641 is a prime.

It is a super-2 number, since 2×12603345409² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 340630957 = 12603345409 / (1 + 2 + 6 + 0 + 3 + 3 + 4 + 5 + 4 + 0 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12603345479) 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, 170315442 + ... + 170315515.

It is an arithmetic number, because the mean of its divisors is an integer number (3235994101).

Almost surely, 2^12603345409 is an apocalyptic number.

It is an amenable number.

12603345409 is a deficient number, since it is larger than the sum of its proper divisors (340630995).

12603345409 is an equidigital number, since it uses as much as digits as its factorization.

12603345409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340630994.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 12603345409 in words is "twelve billion, six hundred three million, three hundred forty-five thousand, four hundred nine".