6540518479 has 8 divisors (see below), whose sum is σ = 7136398800. Its totient is φ = 5944852800.

The previous prime is 6540518459. The next prime is 6540518581. The reversal of 6540518479 is 9748150456.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540518479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540518429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13747 + ... + 115195.

It is an arithmetic number, because the mean of its divisors is an integer number (892049850).

Almost surely, 2^6540518479 is an apocalyptic number.

6540518479 is a deficient number, since it is larger than the sum of its proper divisors (595880321).

6540518479 is a wasteful number, since it uses less digits than its factorization.

6540518479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107321.

The product of its (nonzero) digits is 1209600, while the sum is 49.

The square root of 6540518479 is about 80873.4720350252. The cubic root of 6540518479 is about 1870.1253863707.

The spelling of 6540518479 in words is "six billion, five hundred forty million, five hundred eighteen thousand, four hundred seventy-nine".