28158523045 has 8 divisors (see below), whose sum is σ = 34614379800. Its totient is φ = 21977383680.

The previous prime is 28158523033. The next prime is 28158523067. The reversal of 28158523045 is 54032585182.

It can be written as a sum of positive squares in 4 ways, for example, as 42276004 + 28116247041 = 6502^2 + 167679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28158523045 - 2²⁹ = 27621652133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28158522992 and 28158523010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68679120 + ... + 68679529.

It is an arithmetic number, because the mean of its divisors is an integer number (4326797475).

Almost surely, 2^28158523045 is an apocalyptic number.

It is an amenable number.

28158523045 is a deficient number, since it is larger than the sum of its proper divisors (6455856755).

28158523045 is a wasteful number, since it uses less digits than its factorization.

28158523045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137358695.

The product of its (nonzero) digits is 384000, while the sum is 43.

The spelling of 28158523045 in words is "twenty-eight billion, one hundred fifty-eight million, five hundred twenty-three thousand, forty-five".