5661165515653 has 2 divisors, whose sum is σ = 5661165515654. Its totient is φ = 5661165515652.

The previous prime is 5661165515651. The next prime is 5661165515669. The reversal of 5661165515653 is 3565155611665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3092399624484 + 2568765891169 = 1758522^2 + 1602737^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661165515653 - 2¹ = 5661165515651 is a prime.

Together with 5661165515651, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 5661165515594 and 5661165515603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5661165515651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2830582757826 + 2830582757827.

It is an arithmetic number, because the mean of its divisors is an integer number (2830582757827).

Almost surely, 2^{5661165515653} is an apocalyptic number.

It is an amenable number.

5661165515653 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661165515653 is an equidigital number, since it uses as much as digits as its factorization.

5661165515653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150000, while the sum is 55.

The spelling of 5661165515653 in words is "five trillion, six hundred sixty-one billion, one hundred sixty-five million, five hundred fifteen thousand, six hundred fifty-three".