6499025739 has 32 divisors (see below), whose sum is σ = 9679165440. Its totient is φ = 4309816896.

The previous prime is 6499025707. The next prime is 6499025777. The reversal of 6499025739 is 9375209946.

6499025739 is a `hidden beast` number, since 64 + 9 + 9 + 0 + 2 + 573 + 9 = 666.

It is not a de Polignac number, because 6499025739 - 2⁵ = 6499025707 is a prime.

It is a super-2 number, since 2×6499025739² = 84474671112368992242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6499026739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6113322 + ... + 6114384.

It is an arithmetic number, because the mean of its divisors is an integer number (302473920).

Almost surely, 2^6499025739 is an apocalyptic number.

6499025739 is a deficient number, since it is larger than the sum of its proper divisors (3180139701).

6499025739 is a wasteful number, since it uses less digits than its factorization.

6499025739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The square root of 6499025739 is about 80616.5351463333. The cubic root of 6499025739 is about 1866.1623316970.

The spelling of 6499025739 in words is "six billion, four hundred ninety-nine million, twenty-five thousand, seven hundred thirty-nine".