5165635717221 has 32 divisors (see below), whose sum is σ = 7954994361600. Its totient is φ = 2920538073600.

The previous prime is 5165635717199. The next prime is 5165635717237. The reversal of 5165635717221 is 1227175365615.

It is not a de Polignac number, because 5165635717221 - 2⁶ = 5165635717157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5165635757221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5056 + ... + 3214233.

It is an arithmetic number, because the mean of its divisors is an integer number (248593573800).

Almost surely, 2^{5165635717221} is an apocalyptic number.

It is an amenable number.

5165635717221 is a deficient number, since it is larger than the sum of its proper divisors (2789358644379).

5165635717221 is a wasteful number, since it uses less digits than its factorization.

5165635717221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220109.

The product of its digits is 2646000, while the sum is 51.

The spelling of 5165635717221 in words is "five trillion, one hundred sixty-five billion, six hundred thirty-five million, seven hundred seventeen thousand, two hundred twenty-one".