6541564123 has 4 divisors (see below), whose sum is σ = 6565703008. Its totient is φ = 6517425240.

The previous prime is 6541564103. The next prime is 6541564151. The reversal of 6541564123 is 3214651456.

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

It is a cyclic number.

It is not a de Polignac number, because 6541564123 - 2¹³ = 6541555931 is a prime.

It is a super-2 number, since 2×6541564123² = 85584122350641518258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6541564103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12069036 + ... + 12069577.

It is an arithmetic number, because the mean of its divisors is an integer number (1641425752).

Almost surely, 2^6541564123 is an apocalyptic number.

6541564123 is a deficient number, since it is larger than the sum of its proper divisors (24138885).

6541564123 is a wasteful number, since it uses less digits than its factorization.

6541564123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24138884.

The product of its digits is 86400, while the sum is 37.

The square root of 6541564123 is about 80879.9364675814. The cubic root of 6541564123 is about 1870.2250411201.

The spelling of 6541564123 in words is "six billion, five hundred forty-one million, five hundred sixty-four thousand, one hundred twenty-three".