28257527865 has 16 divisors (see below), whose sum is σ = 51670908288. Its totient is φ = 12917726976.

The previous prime is 28257527861. The next prime is 28257527951. The reversal of 28257527865 is 56872575282.

It is not a de Polignac number, because 28257527865 - 2² = 28257527861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28257527861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134559552 + ... + 134559761.

It is an arithmetic number, because the mean of its divisors is an integer number (3229431768).

Almost surely, 2^28257527865 is an apocalyptic number.

It is an amenable number.

28257527865 is a deficient number, since it is larger than the sum of its proper divisors (23413380423).

28257527865 is a wasteful number, since it uses less digits than its factorization.

28257527865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269119328.

The product of its digits is 18816000, while the sum is 57.

The spelling of 28257527865 in words is "twenty-eight billion, two hundred fifty-seven million, five hundred twenty-seven thousand, eight hundred sixty-five".