28257527863 has 4 divisors (see below), whose sum is σ = 28391450008. Its totient is φ = 28123605720.

The previous prime is 28257527861. The next prime is 28257527951. The reversal of 28257527863 is 36872575282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36872575282 = 2 ⋅18436287641.

It is a cyclic number.

It is not a de Polignac number, because 28257527863 - 2¹ = 28257527861 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 (28257527861) 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, 66960756 + ... + 66961177.

It is an arithmetic number, because the mean of its divisors is an integer number (7097862502).

Almost surely, 2^28257527863 is an apocalyptic number.

28257527863 is a deficient number, since it is larger than the sum of its proper divisors (133922145).

28257527863 is a wasteful number, since it uses less digits than its factorization.

28257527863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133922144.

The product of its digits is 11289600, while the sum is 55.

The spelling of 28257527863 in words is "twenty-eight billion, two hundred fifty-seven million, five hundred twenty-seven thousand, eight hundred sixty-three".