28452687565 has 8 divisors (see below), whose sum is σ = 34145481240. Its totient is φ = 22760645952.

The previous prime is 28452687563. The next prime is 28452687569. The reversal of 28452687565 is 56578625482.

It can be written as a sum of positive squares in 4 ways, for example, as 1621592361 + 26831095204 = 40269^2 + 163802^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28452687565 - 2¹ = 28452687563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28452687563) 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, 101130 + ... + 259099.

It is an arithmetic number, because the mean of its divisors is an integer number (4268185155).

Almost surely, 2^28452687565 is an apocalyptic number.

It is an amenable number.

28452687565 is a deficient number, since it is larger than the sum of its proper divisors (5692793675).

28452687565 is a wasteful number, since it uses less digits than its factorization.

28452687565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376031.

The product of its digits is 32256000, while the sum is 58.

The spelling of 28452687565 in words is "twenty-eight billion, four hundred fifty-two million, six hundred eighty-seven thousand, five hundred sixty-five".