561553006055 has 4 divisors (see below), whose sum is σ = 673863607272. Its totient is φ = 449242404840.

The previous prime is 561553006043. The next prime is 561553006081. The reversal of 561553006055 is 550600355165.

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

It is not a de Polignac number, because 561553006055 - 2⁶ = 561553005991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56155300601 + ... + 56155300610.

It is an arithmetic number, because the mean of its divisors is an integer number (168465901818).

Almost surely, 2^561553006055 is an apocalyptic number.

561553006055 is a deficient number, since it is larger than the sum of its proper divisors (112310601217).

561553006055 is a wasteful number, since it uses less digits than its factorization.

561553006055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112310601216.

The product of its (nonzero) digits is 337500, while the sum is 41.

The spelling of 561553006055 in words is "five hundred sixty-one billion, five hundred fifty-three million, six thousand, fifty-five".