1558398461 has 2 divisors, whose sum is σ = 1558398462. Its totient is φ = 1558398460.

The previous prime is 1558398451. The next prime is 1558398463. The reversal of 1558398461 is 1648938551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142034436 + 416364025 = 33794^2 + 20405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1558398461 is a prime.

Together with 1558398463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1558398463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 779199230 + 779199231.

It is an arithmetic number, because the mean of its divisors is an integer number (779199231).

Almost surely, 2^1558398461 is an apocalyptic number.

It is an amenable number.

1558398461 is a deficient number, since it is larger than the sum of its proper divisors (1).

1558398461 is an equidigital number, since it uses as much as digits as its factorization.

1558398461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1036800, while the sum is 50.

The square root of 1558398461 is about 39476.5558401439. Note that the first 3 decimals coincide. The cubic root of 1558398461 is about 1159.3809769465.

The spelling of 1558398461 in words is "one billion, five hundred fifty-eight million, three hundred ninety-eight thousand, four hundred sixty-one".