28514881633 has 16 divisors (see below), whose sum is σ = 32985621760. Its totient is φ = 24144604416.

The previous prime is 28514881613. The next prime is 28514881663. The reversal of 28514881633 is 33618841582.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28514881633 - 2⁵ = 28514881601 is a prime.

It is the 168864-th Hogben number.

It is not an unprimeable number, because it can be changed into a prime (28514881613) by changing a digit.

It is a nontrivial repunit in base 168863.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246541 + ... + 343237.

It is an arithmetic number, because the mean of its divisors is an integer number (2061601360).

Almost surely, 2^28514881633 is an apocalyptic number.

It is an amenable number.

28514881633 is a deficient number, since it is larger than the sum of its proper divisors (4470740127).

28514881633 is a wasteful number, since it uses less digits than its factorization.

28514881633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97216.

The product of its digits is 1105920, while the sum is 49.

The spelling of 28514881633 in words is "twenty-eight billion, five hundred fourteen million, eight hundred eighty-one thousand, six hundred thirty-three".