6504360491 has 2 divisors, whose sum is σ = 6504360492. Its totient is φ = 6504360490.

The previous prime is 6504360461. The next prime is 6504360539. The reversal of 6504360491 is 1940634056.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6504360491 - 2²⁶ = 6437251627 is a prime.

It is a super-2 number, since 2×6504360491² = 84613410793763522162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6504360431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3252180245 + 3252180246.

It is an arithmetic number, because the mean of its divisors is an integer number (3252180246).

Almost surely, 2^6504360491 is an apocalyptic number.

6504360491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6504360491 is an equidigital number, since it uses as much as digits as its factorization.

6504360491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 6504360491 is about 80649.6155663497. The cubic root of 6504360491 is about 1866.6728077214.

The spelling of 6504360491 in words is "six billion, five hundred four million, three hundred sixty thousand, four hundred ninety-one".