28361116445 has 4 divisors (see below), whose sum is σ = 34033339740. Its totient is φ = 22688893152.

The previous prime is 28361116429. The next prime is 28361116481. The reversal of 28361116445 is 54461116382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54461116382 = 2 ⋅27230558191.

It can be written as a sum of positive squares in 2 ways, for example, as 15298226596 + 13062889849 = 123686^2 + 114293^2 .

It is a cyclic number.

It is not a de Polignac number, because 28361116445 - 2⁴ = 28361116429 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2836111640 + ... + 2836111649.

It is an arithmetic number, because the mean of its divisors is an integer number (8508334935).

Almost surely, 2^28361116445 is an apocalyptic number.

It is an amenable number.

28361116445 is a deficient number, since it is larger than the sum of its proper divisors (5672223295).

28361116445 is an equidigital number, since it uses as much as digits as its factorization.

28361116445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5672223294.

The product of its digits is 138240, while the sum is 41.

The spelling of 28361116445 in words is "twenty-eight billion, three hundred sixty-one million, one hundred sixteen thousand, four hundred forty-five".