6541262161 has 4 divisors (see below), whose sum is σ = 7475728192. Its totient is φ = 5606796132.

The previous prime is 6541262149. The next prime is 6541262213. The reversal of 6541262161 is 1612621456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6541262161 - 2⁷ = 6541262033 is a prime.

It is a super-2 number, since 2×6541262161² = 85576221317860779842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6541262561) 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, 467233005 + ... + 467233018.

It is an arithmetic number, because the mean of its divisors is an integer number (1868932048).

Almost surely, 2^6541262161 is an apocalyptic number.

It is an amenable number.

6541262161 is a deficient number, since it is larger than the sum of its proper divisors (934466031).

6541262161 is an equidigital number, since it uses as much as digits as its factorization.

6541262161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934466030.

The product of its digits is 17280, while the sum is 34.

The square root of 6541262161 is about 80878.0697160856. The cubic root of 6541262161 is about 1870.1962638240.

The spelling of 6541262161 in words is "six billion, five hundred forty-one million, two hundred sixty-two thousand, one hundred sixty-one".