4566981257 has 4 divisors (see below), whose sum is σ = 4614063636. Its totient is φ = 4519898880.

The previous prime is 4566981229. The next prime is 4566981283. The reversal of 4566981257 is 7521896654.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2437989376 + 2128991881 = 49376^2 + 46141^2 .

It is a cyclic number.

It is not a de Polignac number, because 4566981257 - 2⁶ = 4566981193 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4566981199 and 4566981208.

It is not an unprimeable number, because it can be changed into a prime (4566983257) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23541044 + ... + 23541237.

It is an arithmetic number, because the mean of its divisors is an integer number (1153515909).

Almost surely, 2^4566981257 is an apocalyptic number.

It is an amenable number.

4566981257 is a deficient number, since it is larger than the sum of its proper divisors (47082379).

4566981257 is an equidigital number, since it uses as much as digits as its factorization.

4566981257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47082378.

The product of its digits is 3628800, while the sum is 53.

The square root of 4566981257 is about 67579.4440418090. Note that the first 3 decimals coincide. The cubic root of 4566981257 is about 1659.1146942636.

The spelling of 4566981257 in words is "four billion, five hundred sixty-six million, nine hundred eighty-one thousand, two hundred fifty-seven".