5165621369 has 4 divisors (see below), whose sum is σ = 5166388596. Its totient is φ = 5164854144.

The previous prime is 5165621341. The next prime is 5165621381. The reversal of 5165621369 is 9631265615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3374215744 + 1791405625 = 58088^2 + 42325^2 .

It is a cyclic number.

It is not a de Polignac number, because 5165621369 - 2¹² = 5165617273 is a prime.

It is a super-2 number, since 2×5165621369² = 53367288255738868322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5165623369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373424 + ... + 387009.

It is an arithmetic number, because the mean of its divisors is an integer number (1291597149).

Almost surely, 2^5165621369 is an apocalyptic number.

It is an amenable number.

5165621369 is a deficient number, since it is larger than the sum of its proper divisors (767227).

5165621369 is an equidigital number, since it uses as much as digits as its factorization.

5165621369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767226.

The product of its digits is 291600, while the sum is 44.

The square root of 5165621369 is about 71872.2572972353. The cubic root of 5165621369 is about 1728.6518023673.

The spelling of 5165621369 in words is "five billion, one hundred sixty-five million, six hundred twenty-one thousand, three hundred sixty-nine".