28493219655 has 24 divisors (see below), whose sum is σ = 49393197360. Its totient is φ = 15194860800.

The previous prime is 28493219647. The next prime is 28493219659. The reversal of 28493219655 is 55691239482.

28493219655 is a `hidden beast` number, since 284 + 93 + 219 + 65 + 5 = 666.

It is not a de Polignac number, because 28493219655 - 2³ = 28493219647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28493219659) 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, 532516 + ... + 583574.

It is an arithmetic number, because the mean of its divisors is an integer number (2058049890).

Almost surely, 2^28493219655 is an apocalyptic number.

28493219655 is a deficient number, since it is larger than the sum of its proper divisors (20899977705).

28493219655 is a wasteful number, since it uses less digits than its factorization.

28493219655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63471 (or 63468 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The spelling of 28493219655 in words is "twenty-eight billion, four hundred ninety-three million, two hundred nineteen thousand, six hundred fifty-five".