1623664003345 has 4 divisors (see below), whose sum is σ = 1948396804020. Its totient is φ = 1298931202672.

The previous prime is 1623664003343. The next prime is 1623664003391. The reversal of 1623664003345 is 5433004663261.

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 389540753424 + 1234123249921 = 624132^2 + 1110911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1623664003345 - 2¹ = 1623664003343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1623664003343) 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, 162366400330 + ... + 162366400339.

It is an arithmetic number, because the mean of its divisors is an integer number (487099201005).

Almost surely, 2^{1623664003345} is an apocalyptic number.

It is an amenable number.

1623664003345 is a deficient number, since it is larger than the sum of its proper divisors (324732800675).

1623664003345 is an equidigital number, since it uses as much as digits as its factorization.

1623664003345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324732800674.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 1623664003345 in words is "one trillion, six hundred twenty-three billion, six hundred sixty-four million, three thousand, three hundred forty-five".