561552455 has 4 divisors (see below), whose sum is σ = 673862952. Its totient is φ = 449241960.

The previous prime is 561552403. The next prime is 561552457. The reversal of 561552455 is 554255165.

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

It is not a de Polignac number, because 561552455 - 2¹⁴ = 561536071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561552457) 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, 56155241 + ... + 56155250.

It is an arithmetic number, because the mean of its divisors is an integer number (168465738).

Almost surely, 2^561552455 is an apocalyptic number.

561552455 is a deficient number, since it is larger than the sum of its proper divisors (112310497).

561552455 is a wasteful number, since it uses less digits than its factorization.

561552455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112310496.

The product of its digits is 150000, while the sum is 38.

The square root of 561552455 is about 23697.0980290836. The cubic root of 561552455 is about 825.0180369488.

The spelling of 561552455 in words is "five hundred sixty-one million, five hundred fifty-two thousand, four hundred fifty-five".