6541513016123 has 4 divisors (see below), whose sum is σ = 6541526784888. Its totient is φ = 6541499247360.

The previous prime is 6541513016113. The next prime is 6541513016173. The reversal of 6541513016123 is 3216103151456.

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 6541513016123 - 2⁴ = 6541513016107 is a prime.

It is a super-2 number, since 2×6541513016123² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6541513016113) 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, 6145286 + ... + 7130747.

It is an arithmetic number, because the mean of its divisors is an integer number (1635381696222).

Almost surely, 2^{6541513016123} is an apocalyptic number.

6541513016123 is a deficient number, since it is larger than the sum of its proper divisors (13768765).

6541513016123 is a wasteful number, since it uses less digits than its factorization.

6541513016123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13768764.

The product of its (nonzero) digits is 64800, while the sum is 38.

Adding to 6541513016123 its reverse (3216103151456), we get a palindrome (9757616167579).

The spelling of 6541513016123 in words is "six trillion, five hundred forty-one billion, five hundred thirteen million, sixteen thousand, one hundred twenty-three".