4818211497581 has 2 divisors, whose sum is σ = 4818211497582. Its totient is φ = 4818211497580.

The previous prime is 4818211497503. The next prime is 4818211497601. The reversal of 4818211497581 is 1857941128184.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4072465261225 + 745746236356 = 2018035^2 + 863566^2 .

It is a cyclic number.

It is not a de Polignac number, because 4818211497581 - 2²² = 4818207303277 is a prime.

It is a super-2 number, since 2×4818211497581² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4818211497581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4818211493581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2409105748790 + 2409105748791.

It is an arithmetic number, because the mean of its divisors is an integer number (2409105748791).

Almost surely, 2^{4818211497581} is an apocalyptic number.

It is an amenable number.

4818211497581 is a deficient number, since it is larger than the sum of its proper divisors (1).

4818211497581 is an equidigital number, since it uses as much as digits as its factorization.

4818211497581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5160960, while the sum is 59.

The spelling of 4818211497581 in words is "four trillion, eight hundred eighteen billion, two hundred eleven million, four hundred ninety-seven thousand, five hundred eighty-one".