5781985457 has 2 divisors, whose sum is σ = 5781985458. Its totient is φ = 5781985456.

The previous prime is 5781985453. The next prime is 5781985463. The reversal of 5781985457 is 7545891875.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5738214001 + 43771456 = 75751^2 + 6616^2 .

It is a cyclic number.

It is not a de Polignac number, because 5781985457 - 2² = 5781985453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 5781985396 and 5781985405.

It is not a weakly prime, because it can be changed into another prime (5781985453) 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 as a sum of consecutive naturals, namely, 2890992728 + 2890992729.

It is an arithmetic number, because the mean of its divisors is an integer number (2890992729).

Almost surely, 2^5781985457 is an apocalyptic number.

It is an amenable number.

5781985457 is a deficient number, since it is larger than the sum of its proper divisors (1).

5781985457 is an equidigital number, since it uses as much as digits as its factorization.

5781985457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112000, while the sum is 59.

The square root of 5781985457 is about 76039.3678103652. The cubic root of 5781985457 is about 1794.8396912517.

The spelling of 5781985457 in words is "five billion, seven hundred eighty-one million, nine hundred eighty-five thousand, four hundred fifty-seven".