4578645549 has 16 divisors (see below), whose sum is σ = 6284077632. Its totient is φ = 2963196288.

The previous prime is 4578645523. The next prime is 4578645551. The reversal of 4578645549 is 9455468754.

It is not a de Polignac number, because 4578645549 - 2⁸ = 4578645293 is a prime.

It is a super-2 number, since 2×4578645549² = 41927990126755022802, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4578645509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2617 + ... + 95729.

It is an arithmetic number, because the mean of its divisors is an integer number (392754852).

Almost surely, 2^4578645549 is an apocalyptic number.

It is an amenable number.

4578645549 is a deficient number, since it is larger than the sum of its proper divisors (1705432083).

4578645549 is a wasteful number, since it uses less digits than its factorization.

4578645549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93596.

The product of its digits is 24192000, while the sum is 57.

The square root of 4578645549 is about 67665.6895996782. The cubic root of 4578645549 is about 1660.5259799575.

The spelling of 4578645549 in words is "four billion, five hundred seventy-eight million, six hundred forty-five thousand, five hundred forty-nine".