561012455 has 4 divisors (see below), whose sum is σ = 673214952. Its totient is φ = 448809960.

The previous prime is 561012451. The next prime is 561012457. The reversal of 561012455 is 554210165.

It is a happy number.

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

It is not a de Polignac number, because 561012455 - 2² = 561012451 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 (561012451) 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, 56101241 + ... + 56101250.

It is an arithmetic number, because the mean of its divisors is an integer number (168303738).

Almost surely, 2^561012455 is an apocalyptic number.

561012455 is a deficient number, since it is larger than the sum of its proper divisors (112202497).

561012455 is a wasteful number, since it uses less digits than its factorization.

561012455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112202496.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 561012455 is about 23685.7014884508. The cubic root of 561012455 is about 824.7535008899.

The spelling of 561012455 in words is "five hundred sixty-one million, twelve thousand, four hundred fifty-five".