1623355630205 has 4 divisors (see below), whose sum is σ = 1948026756252. Its totient is φ = 1298684504160.

The previous prime is 1623355630177. The next prime is 1623355630229. The reversal of 1623355630205 is 5020365533261.

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 1251380059801 + 371975570404 = 1118651^2 + 609898^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1623355630205 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 162335563016 + ... + 162335563025.

It is an arithmetic number, because the mean of its divisors is an integer number (487006689063).

Almost surely, 2^{1623355630205} is an apocalyptic number.

It is an amenable number.

1623355630205 is a deficient number, since it is larger than the sum of its proper divisors (324671126047).

1623355630205 is an equidigital number, since it uses as much as digits as its factorization.

1623355630205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324671126046.

The product of its (nonzero) digits is 486000, while the sum is 41.

The spelling of 1623355630205 in words is "one trillion, six hundred twenty-three billion, three hundred fifty-five million, six hundred thirty thousand, two hundred five".