28216132745 has 8 divisors (see below), whose sum is σ = 33862133184. Its totient is φ = 22571056944.

The previous prime is 28216132729. The next prime is 28216132817. The reversal of 28216132745 is 54723161282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28216132745 - 2⁴ = 28216132729 is a prime.

It is a super-2 number, since 2×28216132745² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162149 + ... + 287618.

It is an arithmetic number, because the mean of its divisors is an integer number (4232766648).

Almost surely, 2^28216132745 is an apocalyptic number.

It is an amenable number.

28216132745 is a deficient number, since it is larger than the sum of its proper divisors (5646000439).

28216132745 is a wasteful number, since it uses less digits than its factorization.

28216132745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462319.

The product of its digits is 161280, while the sum is 41.

The spelling of 28216132745 in words is "twenty-eight billion, two hundred sixteen million, one hundred thirty-two thousand, seven hundred forty-five".