6501042539 has 4 divisors (see below), whose sum is σ = 6883456824. Its totient is φ = 6118628256.

The previous prime is 6501042523. The next prime is 6501042547. The reversal of 6501042539 is 9352401056.

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 6501042539 - 2⁴ = 6501042523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6501042499 and 6501042508.

It is not an unprimeable number, because it can be changed into a prime (6501042589) 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, 191207117 + ... + 191207150.

It is an arithmetic number, because the mean of its divisors is an integer number (1720864206).

Almost surely, 2^6501042539 is an apocalyptic number.

6501042539 is a deficient number, since it is larger than the sum of its proper divisors (382414285).

6501042539 is a wasteful number, since it uses less digits than its factorization.

6501042539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382414284.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 6501042539 is about 80629.0427761610. The cubic root of 6501042539 is about 1866.3553497016.

The spelling of 6501042539 in words is "six billion, five hundred one million, forty-two thousand, five hundred thirty-nine".