6499924157 has 2 divisors, whose sum is σ = 6499924158. Its totient is φ = 6499924156.

The previous prime is 6499924103. The next prime is 6499924169. The reversal of 6499924157 is 7514299946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4281608356 + 2218315801 = 65434^2 + 47099^2 .

It is a cyclic number.

It is not a de Polignac number, because 6499924157 - 2²⁴ = 6483146941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6499924957) 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, 3249962078 + 3249962079.

It is an arithmetic number, because the mean of its divisors is an integer number (3249962079).

Almost surely, 2^6499924157 is an apocalyptic number.

It is an amenable number.

6499924157 is a deficient number, since it is larger than the sum of its proper divisors (1).

6499924157 is an equidigital number, since it uses as much as digits as its factorization.

6499924157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 56.

The square root of 6499924157 is about 80622.1071232947. The cubic root of 6499924157 is about 1866.2483197947.

The spelling of 6499924157 in words is "six billion, four hundred ninety-nine million, nine hundred twenty-four thousand, one hundred fifty-seven".