6542182561 has 4 divisors (see below), whose sum is σ = 6542346132. Its totient is φ = 6542018992.

The previous prime is 6542182519. The next prime is 6542182601. The reversal of 6542182561 is 1652812456.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 135140625 + 6407041936 = 11625^2 + 80044^2 .

It is a cyclic number.

It is not a de Polignac number, because 6542182561 - 2¹³ = 6542174369 is a prime.

It is a super-2 number, since 2×6542182561² = 85600305322905037442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6542182501) 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, 22731 + ... + 116623.

It is an arithmetic number, because the mean of its divisors is an integer number (1635586533).

Almost surely, 2^6542182561 is an apocalyptic number.

It is an amenable number.

6542182561 is a deficient number, since it is larger than the sum of its proper divisors (163571).

6542182561 is an equidigital number, since it uses as much as digits as its factorization.

6542182561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163570.

The product of its digits is 115200, while the sum is 40.

The square root of 6542182561 is about 80883.7595627206. The cubic root of 6542182561 is about 1870.2839761477.

The spelling of 6542182561 in words is "six billion, five hundred forty-two million, one hundred eighty-two thousand, five hundred sixty-one".