5661565155616 has 96 divisors (see below), whose sum is σ = 11840333319360. Its totient is φ = 2655587844096.

The previous prime is 5661565155611. The next prime is 5661565155629. The reversal of 5661565155616 is 6165515651665.

It is a super-2 number, since 2×5661565155616² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5661565155611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806602155 + ... + 806609173.

It is an arithmetic number, because the mean of its divisors is an integer number (123336805410).

Almost surely, 2^{5661565155616} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5661565155616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5920166659680).

5661565155616 is an abundant number, since it is smaller than the sum of its proper divisors (6178768163744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5661565155616 is a wasteful number, since it uses less digits than its factorization.

5661565155616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11666 (or 11658 counting only the distinct ones).

The product of its digits is 24300000, while the sum is 58.

The spelling of 5661565155616 in words is "five trillion, six hundred sixty-one billion, five hundred sixty-five million, one hundred fifty-five thousand, six hundred sixteen".