4161512565 has 64 divisors (see below), whose sum is σ = 8614771200. Its totient is φ = 1866488832.

The previous prime is 4161512561. The next prime is 4161512591. The reversal of 4161512565 is 5652151614.

4161512565 is a `hidden beast` number, since 41 + 6 + 1 + 51 + 2 + 565 = 666.

4161512565 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4161512565 - 2² = 4161512561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4161512561) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8541 + ... + 91629.

It is an arithmetic number, because the mean of its divisors is an integer number (134605800).

Almost surely, 2^4161512565 is an apocalyptic number.

4161512565 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4161512565 is an abundant number, since it is smaller than the sum of its proper divisors (4453258635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4161512565 is a wasteful number, since it uses less digits than its factorization.

4161512565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83163 (or 83157 counting only the distinct ones).

The product of its digits is 36000, while the sum is 36.

The square root of 4161512565 is about 64509.7865831224. The cubic root of 4161512565 is about 1608.4852031831.

The spelling of 4161512565 in words is "four billion, one hundred sixty-one million, five hundred twelve thousand, five hundred sixty-five".