556691461 has 2 divisors, whose sum is σ = 556691462. Its totient is φ = 556691460.

The previous prime is 556691441. The next prime is 556691477. The reversal of 556691461 is 164196655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 547840836 + 8850625 = 23406^2 + 2975^2 .

It is a cyclic number.

It is not a de Polignac number, because 556691461 - 2⁹ = 556690949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556691411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278345730 + 278345731.

It is an arithmetic number, because the mean of its divisors is an integer number (278345731).

Almost surely, 2^556691461 is an apocalyptic number.

It is an amenable number.

556691461 is a deficient number, since it is larger than the sum of its proper divisors (1).

556691461 is an equidigital number, since it uses as much as digits as its factorization.

556691461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 43.

The square root of 556691461 is about 23594.3099284552. The cubic root of 556691461 is about 822.6305867683.

The spelling of 556691461 in words is "five hundred fifty-six million, six hundred ninety-one thousand, four hundred sixty-one".