6513127157539 has 4 divisors (see below), whose sum is σ = 6623519143320. Its totient is φ = 6402735171760.

The previous prime is 6513127157497. The next prime is 6513127157573. The reversal of 6513127157539 is 9357517213156.

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 6513127157539 - 2⁹ = 6513127157027 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6513127157539.

It is not an unprimeable number, because it can be changed into a prime (6513127157599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55195992802 + ... + 55195992919.

It is an arithmetic number, because the mean of its divisors is an integer number (1655879785830).

Almost surely, 2^{6513127157539} is an apocalyptic number.

6513127157539 is a deficient number, since it is larger than the sum of its proper divisors (110391985781).

6513127157539 is a wasteful number, since it uses less digits than its factorization.

6513127157539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110391985780.

The product of its digits is 5953500, while the sum is 55.

The spelling of 6513127157539 in words is "six trillion, five hundred thirteen billion, one hundred twenty-seven million, one hundred fifty-seven thousand, five hundred thirty-nine".