6540497039 has 4 divisors (see below), whose sum is σ = 6541211040. Its totient is φ = 6539783040.

The previous prime is 6540496987. The next prime is 6540497063. The reversal of 6540497039 is 9307940456.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6540497039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6540496984 and 6540497002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540497939) 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, 343079 + ... + 361640.

It is an arithmetic number, because the mean of its divisors is an integer number (1635302760).

Almost surely, 2^6540497039 is an apocalyptic number.

6540497039 is a deficient number, since it is larger than the sum of its proper divisors (714001).

6540497039 is an equidigital number, since it uses as much as digits as its factorization.

6540497039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714000.

The product of its (nonzero) digits is 816480, while the sum is 47.

The square root of 6540497039 is about 80873.3394821804. The cubic root of 6540497039 is about 1870.1233429276.

The spelling of 6540497039 in words is "six billion, five hundred forty million, four hundred ninety-seven thousand, thirty-nine".