5645821455 has 24 divisors (see below), whose sum is σ = 9829991808. Its totient is φ = 2997596736.

The previous prime is 5645821429. The next prime is 5645821487. The reversal of 5645821455 is 5541285465.

5645821455 is a `hidden beast` number, since 5 + 6 + 4 + 582 + 14 + 55 = 666.

It is not a de Polignac number, because 5645821455 - 2⁸ = 5645821199 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 5645821455.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 271272 + ... + 291341.

It is an arithmetic number, because the mean of its divisors is an integer number (409582992).

Almost surely, 2^5645821455 is an apocalyptic number.

5645821455 is a deficient number, since it is larger than the sum of its proper divisors (4184170353).

5645821455 is a wasteful number, since it uses less digits than its factorization.

5645821455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562847 (or 562844 counting only the distinct ones).

The product of its digits is 960000, while the sum is 45.

The square root of 5645821455 is about 75138.6814829752. The cubic root of 5645821455 is about 1780.6383115559.

The spelling of 5645821455 in words is "five billion, six hundred forty-five million, eight hundred twenty-one thousand, four hundred fifty-five".