28135026571 has 16 divisors (see below), whose sum is σ = 30097738944. Its totient is φ = 26207878144.

The previous prime is 28135026553. The next prime is 28135026581. The reversal of 28135026571 is 17562053182.

It is a cyclic number.

It is not a de Polignac number, because 28135026571 - 2⁵ = 28135026539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28135026581) 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, 640221 + ... + 682753.

It is an arithmetic number, because the mean of its divisors is an integer number (1881108684).

Almost surely, 2^28135026571 is an apocalyptic number.

28135026571 is a deficient number, since it is larger than the sum of its proper divisors (1962712373).

28135026571 is a wasteful number, since it uses less digits than its factorization.

28135026571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42950.

The product of its (nonzero) digits is 100800, while the sum is 40.

The spelling of 28135026571 in words is "twenty-eight billion, one hundred thirty-five million, twenty-six thousand, five hundred seventy-one".