4554681993 has 6 divisors (see below), whose sum is σ = 6578985114. Its totient is φ = 3036454656.

The previous prime is 4554681983. The next prime is 4554681997. The reversal of 4554681993 is 3991864554.

4554681993 is a `hidden beast` number, since 4 + 5 + 546 + 8 + 1 + 9 + 93 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3218633289 + 1336048704 = 56733^2 + 36552^2 .

It is not a de Polignac number, because 4554681993 - 2¹³ = 4554673801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4554681997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253037880 + ... + 253037897.

It is an arithmetic number, because the mean of its divisors is an integer number (1096497519).

Almost surely, 2^4554681993 is an apocalyptic number.

It is an amenable number.

4554681993 is a deficient number, since it is larger than the sum of its proper divisors (2024303121).

4554681993 is a wasteful number, since it uses less digits than its factorization.

4554681993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506075783 (or 506075780 counting only the distinct ones).

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

The square root of 4554681993 is about 67488.3841338641. The cubic root of 4554681993 is about 1657.6239768585.

The spelling of 4554681993 in words is "four billion, five hundred fifty-four million, six hundred eighty-one thousand, nine hundred ninety-three".