28042072663 has 4 divisors (see below), whose sum is σ = 30591352008. Its totient is φ = 25492793320.

The previous prime is 28042072637. The next prime is 28042072691. The reversal of 28042072663 is 36627024082.

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 28042072663 - 2¹³ = 28042064471 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 (28042072363) 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, 1274639656 + ... + 1274639677.

It is an arithmetic number, because the mean of its divisors is an integer number (7647838002).

Almost surely, 2^28042072663 is an apocalyptic number.

28042072663 is a deficient number, since it is larger than the sum of its proper divisors (2549279345).

28042072663 is a wasteful number, since it uses less digits than its factorization.

28042072663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549279344.

The product of its (nonzero) digits is 193536, while the sum is 40.

The spelling of 28042072663 in words is "twenty-eight billion, forty-two million, seventy-two thousand, six hundred sixty-three".