6494978807 has 2 divisors, whose sum is σ = 6494978808. Its totient is φ = 6494978806.

The previous prime is 6494978771. The next prime is 6494978827. The reversal of 6494978807 is 7088794946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6494978807 - 2¹² = 6494974711 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6494978807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6494978827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3247489403 + 3247489404.

It is an arithmetic number, because the mean of its divisors is an integer number (3247489404).

Almost surely, 2^6494978807 is an apocalyptic number.

6494978807 is a deficient number, since it is larger than the sum of its proper divisors (1).

6494978807 is an equidigital number, since it uses as much as digits as its factorization.

6494978807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 62.

The square root of 6494978807 is about 80591.4313497409. The cubic root of 6494978807 is about 1865.7748992577.

The spelling of 6494978807 in words is "six billion, four hundred ninety-four million, nine hundred seventy-eight thousand, eight hundred seven".