6499925273 has 2 divisors, whose sum is σ = 6499925274. Its totient is φ = 6499925272.

The previous prime is 6499925269. The next prime is 6499925293. The reversal of 6499925273 is 3725299946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6498294544 + 1630729 = 80612^2 + 1277^2 .

It is a cyclic number.

It is not a de Polignac number, because 6499925273 - 2² = 6499925269 is a prime.

It is not a weakly prime, because it can be changed into another prime (6499925233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3249962636 + 3249962637.

It is an arithmetic number, because the mean of its divisors is an integer number (3249962637).

Almost surely, 2^6499925273 is an apocalyptic number.

It is an amenable number.

6499925273 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499925273 is an equidigital number, since it uses as much as digits as its factorization.

6499925273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 56.

The square root of 6499925273 is about 80622.1140444729. The cubic root of 6499925273 is about 1866.2484266027.

The spelling of 6499925273 in words is "six billion, four hundred ninety-nine million, nine hundred twenty-five thousand, two hundred seventy-three".