1813573555423 has 16 divisors (see below), whose sum is σ = 2102469972480. Its totient is φ = 1532143720800.

The previous prime is 1813573555369. The next prime is 1813573555457. The reversal of 1813573555423 is 3245553753181.

It is a happy number.

It is not a de Polignac number, because 1813573555423 - 2²¹ = 1813571458271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1813573555823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1145968 + ... + 2222698.

It is an arithmetic number, because the mean of its divisors is an integer number (131404373280).

Almost surely, 2^{1813573555423} is an apocalyptic number.

1813573555423 is a deficient number, since it is larger than the sum of its proper divisors (288896417057).

1813573555423 is a wasteful number, since it uses less digits than its factorization.

1813573555423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080198.

The product of its digits is 7560000, while the sum is 52.

The spelling of 1813573555423 in words is "one trillion, eight hundred thirteen billion, five hundred seventy-three million, five hundred fifty-five thousand, four hundred twenty-three".