28089651645 has 96 divisors (see below), whose sum is σ = 54991872000. Its totient is φ = 13140604800.

The previous prime is 28089651559. The next prime is 28089651671. The reversal of 28089651645 is 54615698082.

28089651645 is a `hidden beast` number, since 2 + 8 + 0 + 89 + 6 + 516 + 45 = 666.

It is not a de Polignac number, because 28089651645 - 2¹¹ = 28089649597 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28089651591 and 28089651600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5506306 + ... + 5511404.

It is an arithmetic number, because the mean of its divisors is an integer number (572832000).

Almost surely, 2^28089651645 is an apocalyptic number.

It is an amenable number.

28089651645 is a deficient number, since it is larger than the sum of its proper divisors (26902220355).

28089651645 is a wasteful number, since it uses less digits than its factorization.

28089651645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511 (or 5508 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 28089651645 in words is "twenty-eight billion, eighty-nine million, six hundred fifty-one thousand, six hundred forty-five".