815498461 has 2 divisors, whose sum is σ = 815498462. Its totient is φ = 815498460.

The previous prime is 815498401. The next prime is 815498477. The reversal of 815498461 is 164894518.

815498461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 809402500 + 6095961 = 28450^2 + 2469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-815498461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (815498401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407749230 + 407749231.

It is an arithmetic number, because the mean of its divisors is an integer number (407749231).

Almost surely, 2^815498461 is an apocalyptic number.

It is an amenable number.

815498461 is a deficient number, since it is larger than the sum of its proper divisors (1).

815498461 is an equidigital number, since it uses as much as digits as its factorization.

815498461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The square root of 815498461 is about 28556.9336764296. The cubic root of 815498461 is about 934.2742558555.

The spelling of 815498461 in words is "eight hundred fifteen million, four hundred ninety-eight thousand, four hundred sixty-one".