15545544404023 has 4 divisors (see below), whose sum is σ = 15667950265600. Its totient is φ = 15423138542448.

The previous prime is 15545544403993. The next prime is 15545544404029. The reversal of 15545544404023 is 32040444554551.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15545544404023 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 (15545544404029) 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, 61202930598 + ... + 61202930851.

It is an arithmetic number, because the mean of its divisors is an integer number (3916987566400).

Almost surely, 2^{15545544404023} is an apocalyptic number.

15545544404023 is a deficient number, since it is larger than the sum of its proper divisors (122405861577).

15545544404023 is a wasteful number, since it uses less digits than its factorization.

15545544404023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122405861576.

The product of its (nonzero) digits is 3840000, while the sum is 46.

Adding to 15545544404023 its reverse (32040444554551), we get a palindrome (47585988958574).

The spelling of 15545544404023 in words is "fifteen trillion, five hundred forty-five billion, five hundred forty-four million, four hundred four thousand, twenty-three".