555000565561 has 4 divisors (see below), whose sum is σ = 597692916772. Its totient is φ = 512308214352.

The previous prime is 555000565549. The next prime is 555000565583. The reversal of 555000565561 is 165565000555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 372270819600 + 182729745961 = 610140^2 + 427469^2 .

It is a cyclic number.

It is not a de Polignac number, because 555000565561 - 2¹⁷ = 555000434489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (555000565531) 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, 21346175586 + ... + 21346175611.

It is an arithmetic number, because the mean of its divisors is an integer number (149423229193).

Almost surely, 2^555000565561 is an apocalyptic number.

It is an amenable number.

555000565561 is a deficient number, since it is larger than the sum of its proper divisors (42692351211).

555000565561 is a wasteful number, since it uses less digits than its factorization.

555000565561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42692351210.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 555000565561 in words is "five hundred fifty-five billion, five hundred sixty-five thousand, five hundred sixty-one".