6540807293 has 2 divisors, whose sum is σ = 6540807294. Its totient is φ = 6540807292.

The previous prime is 6540807277. The next prime is 6540807347. The reversal of 6540807293 is 3927080456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6441346564 + 99460729 = 80258^2 + 9973^2 .

It is a cyclic number.

It is not a de Polignac number, because 6540807293 - 2⁴ = 6540807277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6540807223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270403646 + 3270403647.

It is an arithmetic number, because the mean of its divisors is an integer number (3270403647).

Almost surely, 2^6540807293 is an apocalyptic number.

It is an amenable number.

6540807293 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540807293 is an equidigital number, since it uses as much as digits as its factorization.

6540807293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 6540807293 is about 80875.2576070086. The cubic root of 6540807293 is about 1870.1529127534.

The spelling of 6540807293 in words is "six billion, five hundred forty million, eight hundred seven thousand, two hundred ninety-three".