28178046870453 has 24 divisors (see below), whose sum is σ = 41260106888000. Its totient is φ = 18527614470720.

The previous prime is 28178046870451. The next prime is 28178046870481. The reversal of 28178046870453 is 35407864087182.

It is a happy number.

28178046870453 is a `hidden beast` number, since 2 + 8 + 1 + 78 + 0 + 46 + 8 + 70 + 453 = 666.

It is not a de Polignac number, because 28178046870453 - 2¹ = 28178046870451 is a prime.

It is a super-2 number, since 2×28178046870453² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28178046870451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30270048 + ... + 31187046.

Almost surely, 2^{28178046870453} is an apocalyptic number.

It is an amenable number.

28178046870453 is a deficient number, since it is larger than the sum of its proper divisors (13082060017547).

28178046870453 is a wasteful number, since it uses less digits than its factorization.

28178046870453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963849 (or 963846 counting only the distinct ones).

The product of its (nonzero) digits is 72253440, while the sum is 63.

The spelling of 28178046870453 in words is "twenty-eight trillion, one hundred seventy-eight billion, forty-six million, eight hundred seventy thousand, four hundred fifty-three".