28715744573143 has 4 divisors (see below), whose sum is σ = 30404906018640. Its totient is φ = 27026583127648.

The previous prime is 28715744573107. The next prime is 28715744573161. The reversal of 28715744573143 is 34137544751782.

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-28715744573143 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 (28715744573443) 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, 844580722723 + ... + 844580722756.

It is an arithmetic number, because the mean of its divisors is an integer number (7601226504660).

Almost surely, 2^{28715744573143} is an apocalyptic number.

28715744573143 is a deficient number, since it is larger than the sum of its proper divisors (1689161445497).

28715744573143 is a wasteful number, since it uses less digits than its factorization.

28715744573143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689161445496.

The product of its digits is 79027200, while the sum is 61.

The spelling of 28715744573143 in words is "twenty-eight trillion, seven hundred fifteen billion, seven hundred forty-four million, five hundred seventy-three thousand, one hundred forty-three".