1816548457 has 2 divisors, whose sum is σ = 1816548458. Its totient is φ = 1816548456.

The previous prime is 1816548451. The next prime is 1816548469. The reversal of 1816548457 is 7548456181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1787936656 + 28611801 = 42284^2 + 5349^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816548457 - 2¹¹ = 1816546409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1816548457.

It is not a weakly prime, because it can be changed into another prime (1816548451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908274228 + 908274229.

It is an arithmetic number, because the mean of its divisors is an integer number (908274229).

Almost surely, 2^1816548457 is an apocalyptic number.

It is an amenable number.

1816548457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816548457 is an equidigital number, since it uses as much as digits as its factorization.

1816548457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1075200, while the sum is 49.

The square root of 1816548457 is about 42620.9861101312. The cubic root of 1816548457 is about 1220.1568500746.

The spelling of 1816548457 in words is "one billion, eight hundred sixteen million, five hundred forty-eight thousand, four hundred fifty-seven".