56511610165165 has 8 divisors (see below), whose sum is σ = 67818927045240. Its totient is φ = 45205958234112.

The previous prime is 56511610165163. The next prime is 56511610165187. The reversal of 56511610165165 is 56156101611565.

It can be written as a sum of positive squares in 4 ways, for example, as 11308013582121 + 45203596583044 = 3362739^2 + 6723362^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56511610165165 - 2¹ = 56511610165163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56511610165163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 416162580 + ... + 416298349.

It is an arithmetic number, because the mean of its divisors is an integer number (8477365880655).

Almost surely, 2^{56511610165165} is an apocalyptic number.

It is an amenable number.

56511610165165 is a deficient number, since it is larger than the sum of its proper divisors (11307316880075).

56511610165165 is a wasteful number, since it uses less digits than its factorization.

56511610165165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 832474511.

The product of its (nonzero) digits is 810000, while the sum is 49.

The spelling of 56511610165165 in words is "fifty-six trillion, five hundred eleven billion, six hundred ten million, one hundred sixty-five thousand, one hundred sixty-five".