28517842155 has 16 divisors (see below), whose sum is σ = 49776597504. Its totient is φ = 13826832480.

The previous prime is 28517842139. The next prime is 28517842211. The reversal of 28517842155 is 55124871582.

It is not a de Polignac number, because 28517842155 - 2⁴ = 28517842139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86417539 + ... + 86417868.

It is an arithmetic number, because the mean of its divisors is an integer number (3111037344).

Almost surely, 2^28517842155 is an apocalyptic number.

28517842155 is a deficient number, since it is larger than the sum of its proper divisors (21258755349).

28517842155 is a wasteful number, since it uses less digits than its factorization.

28517842155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172835426.

The product of its digits is 896000, while the sum is 48.

The spelling of 28517842155 in words is "twenty-eight billion, five hundred seventeen million, eight hundred forty-two thousand, one hundred fifty-five".