28158473653 has 4 divisors (see below), whose sum is σ = 28174837068. Its totient is φ = 28142110240.

The previous prime is 28158473647. The next prime is 28158473663. The reversal of 28158473653 is 35637485182.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18758589444 + 9399884209 = 136962^2 + 96953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28158473653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28158473653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28158473663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8179126 + ... + 8182567.

It is an arithmetic number, because the mean of its divisors is an integer number (7043709267).

Almost surely, 2^28158473653 is an apocalyptic number.

It is an amenable number.

28158473653 is a deficient number, since it is larger than the sum of its proper divisors (16363415).

28158473653 is a wasteful number, since it uses less digits than its factorization.

28158473653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16363414.

The product of its digits is 4838400, while the sum is 52.

The spelling of 28158473653 in words is "twenty-eight billion, one hundred fifty-eight million, four hundred seventy-three thousand, six hundred fifty-three".