561602555 has 4 divisors (see below), whose sum is σ = 673923072. Its totient is φ = 449282040.

The previous prime is 561602527. The next prime is 561602557. The reversal of 561602555 is 555206165.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 561602555 - 2¹² = 561598459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (561602557) 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, 56160251 + ... + 56160260.

It is an arithmetic number, because the mean of its divisors is an integer number (168480768).

Almost surely, 2^561602555 is an apocalyptic number.

561602555 is a deficient number, since it is larger than the sum of its proper divisors (112320517).

561602555 is a wasteful number, since it uses less digits than its factorization.

561602555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112320516.

The product of its (nonzero) digits is 45000, while the sum is 35.

The square root of 561602555 is about 23698.1550969690. The cubic root of 561602555 is about 825.0425714181.

The spelling of 561602555 in words is "five hundred sixty-one million, six hundred two thousand, five hundred fifty-five".