28025571265 has 8 divisors (see below), whose sum is σ = 33928302888. Its totient is φ = 22222045440.

The previous prime is 28025571263. The next prime is 28025571281. The reversal of 28025571265 is 56217552082.

It can be written as a sum of positive squares in 4 ways, for example, as 3132305089 + 24893266176 = 55967^2 + 157776^2 .

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

It is not a de Polignac number, because 28025571265 - 2¹ = 28025571263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28025571263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24800826 + ... + 24801955.

It is an arithmetic number, because the mean of its divisors is an integer number (4241037861).

Almost surely, 2^28025571265 is an apocalyptic number.

It is an amenable number.

28025571265 is a deficient number, since it is larger than the sum of its proper divisors (5902731623).

28025571265 is a wasteful number, since it uses less digits than its factorization.

28025571265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49602899.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 28025571265 in words is "twenty-eight billion, twenty-five million, five hundred seventy-one thousand, two hundred sixty-five".