1605422403203 has 4 divisors (see below), whose sum is σ = 1611669183240. Its totient is φ = 1599175623168.

The previous prime is 1605422403191. The next prime is 1605422403223. The reversal of 1605422403203 is 3023042245061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1605422403203 - 2²⁰ = 1605421354627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1605422403203.

It is not an unprimeable number, because it can be changed into a prime (1605422403223) 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, 3123389633 + ... + 3123390146.

It is an arithmetic number, because the mean of its divisors is an integer number (402917295810).

Almost surely, 2^{1605422403203} is an apocalyptic number.

1605422403203 is a deficient number, since it is larger than the sum of its proper divisors (6246780037).

1605422403203 is an equidigital number, since it uses as much as digits as its factorization.

1605422403203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6246780036.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 1605422403203 its reverse (3023042245061), we get a palindrome (4628464648264).

The spelling of 1605422403203 in words is "one trillion, six hundred five billion, four hundred twenty-two million, four hundred three thousand, two hundred three".