52161621065 has 8 divisors (see below), whose sum is σ = 64049618688. Its totient is φ = 40758847920.

The previous prime is 52161621013. The next prime is 52161621073. The reversal of 52161621065 is 56012616125.

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

It is a de Polignac number, because none of the positive numbers 2^k-52161621065 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121305881 + ... + 121306310.

It is an arithmetic number, because the mean of its divisors is an integer number (8006202336).

Almost surely, 2^52161621065 is an apocalyptic number.

It is an amenable number.

52161621065 is a deficient number, since it is larger than the sum of its proper divisors (11887997623).

52161621065 is a wasteful number, since it uses less digits than its factorization.

52161621065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242612239.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 52161621065 in words is "fifty-two billion, one hundred sixty-one million, six hundred twenty-one thousand, sixty-five".