554707561 has 4 divisors (see below), whose sum is σ = 554756932. Its totient is φ = 554658192.

The previous prime is 554707547. The next prime is 554707597. The reversal of 554707561 is 165707455.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 315417600 + 239289961 = 17760^2 + 15469^2 .

It is a cyclic number.

It is not a de Polignac number, because 554707561 - 2⁵ = 554707529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (554707511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1255 + ... + 33331.

It is an arithmetic number, because the mean of its divisors is an integer number (138689233).

Almost surely, 2^554707561 is an apocalyptic number.

It is an amenable number.

554707561 is a deficient number, since it is larger than the sum of its proper divisors (49371).

554707561 is a wasteful number, since it uses less digits than its factorization.

554707561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49370.

The product of its (nonzero) digits is 147000, while the sum is 40.

The square root of 554707561 is about 23552.2304888518. The cubic root of 554707561 is about 821.6522115676.

The spelling of 554707561 in words is "five hundred fifty-four million, seven hundred seven thousand, five hundred sixty-one".