15345551444543 has 4 divisors (see below), whose sum is σ = 15345564104640. Its totient is φ = 15345538784448.

The previous prime is 15345551444533. The next prime is 15345551444567. The reversal of 15345551444543 is 34544415554351.

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 15345551444543 - 2¹² = 15345551440447 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 (15345551444533) 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, 4293455 + ... + 7008912.

It is an arithmetic number, because the mean of its divisors is an integer number (3836391026160).

Almost surely, 2^{15345551444543} is an apocalyptic number.

15345551444543 is a deficient number, since it is larger than the sum of its proper divisors (12660097).

15345551444543 is a wasteful number, since it uses less digits than its factorization.

15345551444543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12660096.

The product of its digits is 28800000, while the sum is 53.

Adding to 15345551444543 its reverse (34544415554351), we get a palindrome (49889966998894).

The spelling of 15345551444543 in words is "fifteen trillion, three hundred forty-five billion, five hundred fifty-one million, four hundred forty-four thousand, five hundred forty-three".