6499000961 has 2 divisors, whose sum is σ = 6499000962. Its totient is φ = 6499000960.

The previous prime is 6499000943. The next prime is 6499001051. The reversal of 6499000961 is 1690009946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6460944400 + 38056561 = 80380^2 + 6169^2 .

It is a cyclic number.

It is not a de Polignac number, because 6499000961 - 2¹⁸ = 6498738817 is a prime.

It is not a weakly prime, because it can be changed into another prime (6499000061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3249500480 + 3249500481.

It is an arithmetic number, because the mean of its divisors is an integer number (3249500481).

Almost surely, 2^6499000961 is an apocalyptic number.

It is an amenable number.

6499000961 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499000961 is an equidigital number, since it uses as much as digits as its factorization.

6499000961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 6499000961 is about 80616.3814680366. The cubic root of 6499000961 is about 1866.1599600683.

The spelling of 6499000961 in words is "six billion, four hundred ninety-nine million, nine hundred sixty-one", and thus it is an aban number.