28667511625 has 16 divisors (see below), whose sum is σ = 35783399808. Its totient is φ = 22929942000.

The previous prime is 28667511623. The next prime is 28667511683. The reversal of 28667511625 is 52611576682.

It is not a de Polignac number, because 28667511625 - 2¹ = 28667511623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28667511623) 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, 828420 + ... + 862330.

It is an arithmetic number, because the mean of its divisors is an integer number (2236462488).

Almost surely, 2^28667511625 is an apocalyptic number.

28667511625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28667511625 is a deficient number, since it is larger than the sum of its proper divisors (7115888183).

28667511625 is an equidigital number, since it uses as much as digits as its factorization.

28667511625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40689 (or 40679 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The spelling of 28667511625 in words is "twenty-eight billion, six hundred sixty-seven million, five hundred eleven thousand, six hundred twenty-five".