5561606555 has 4 divisors (see below), whose sum is σ = 6673927872. Its totient is φ = 4449285240.

The previous prime is 5561606549. The next prime is 5561606599. The reversal of 5561606555 is 5556061655.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5556061655 = 5 ⋅1111212331.

It is not a de Polignac number, because 5561606555 - 2⁴ = 5561606539 is a prime.

It is a Duffinian 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, 556160651 + ... + 556160660.

It is an arithmetic number, because the mean of its divisors is an integer number (1668481968).

Almost surely, 2^5561606555 is an apocalyptic number.

5561606555 is a deficient number, since it is larger than the sum of its proper divisors (1112321317).

5561606555 is a wasteful number, since it uses less digits than its factorization.

5561606555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112321316.

The product of its (nonzero) digits is 675000, while the sum is 44.

The square root of 5561606555 is about 74576.1795414595. The cubic root of 5561606555 is about 1771.7403966338.

The spelling of 5561606555 in words is "five billion, five hundred sixty-one million, six hundred six thousand, five hundred fifty-five".