554159561 has 2 divisors, whose sum is σ = 554159562. Its totient is φ = 554159560.

The previous prime is 554159513. The next prime is 554159587. The reversal of 554159561 is 165951455.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415956025 + 138203536 = 20395^2 + 11756^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-554159561 is a prime.

It is not a weakly prime, because it can be changed into another prime (554119561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277079780 + 277079781.

It is an arithmetic number, because the mean of its divisors is an integer number (277079781).

Almost surely, 2^554159561 is an apocalyptic number.

It is an amenable number.

554159561 is a deficient number, since it is larger than the sum of its proper divisors (1).

554159561 is an equidigital number, since it uses as much as digits as its factorization.

554159561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135000, while the sum is 41.

The square root of 554159561 is about 23540.5938965014. The cubic root of 554159561 is about 821.3815501726.

The spelling of 554159561 in words is "five hundred fifty-four million, one hundred fifty-nine thousand, five hundred sixty-one".