5661106561563 has 4 divisors (see below), whose sum is σ = 7548142082088. Its totient is φ = 3774071041040.

The previous prime is 5661106561553. The next prime is 5661106561577. The reversal of 5661106561563 is 3651656011665.

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

It is a cyclic number.

It is not a de Polignac number, because 5661106561563 - 2⁸ = 5661106561307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5661106561553) 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, 943517760258 + ... + 943517760263.

It is an arithmetic number, because the mean of its divisors is an integer number (1887035520522).

Almost surely, 2^{5661106561563} is an apocalyptic number.

5661106561563 is a deficient number, since it is larger than the sum of its proper divisors (1887035520525).

5661106561563 is a wasteful number, since it uses less digits than its factorization.

5661106561563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887035520524.

The product of its (nonzero) digits is 2916000, while the sum is 51.

The spelling of 5661106561563 in words is "five trillion, six hundred sixty-one billion, one hundred six million, five hundred sixty-one thousand, five hundred sixty-three".