6499229945 has 16 divisors (see below), whose sum is σ = 8764180992. Its totient is φ = 4590759360.

The previous prime is 6499229939. The next prime is 6499229951. The reversal of 6499229945 is 5499229946.

It is an interprime number because it is at equal distance from previous prime (6499229939) and next prime (6499229951).

It is not a de Polignac number, because 6499229945 - 2⁴ = 6499229929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2172161 + ... + 2175150.

It is an arithmetic number, because the mean of its divisors is an integer number (547761312).

Almost surely, 2^6499229945 is an apocalyptic number.

6499229945 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6499229945 is a deficient number, since it is larger than the sum of its proper divisors (2264951047).

6499229945 is a wasteful number, since it uses less digits than its factorization.

6499229945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347352.

The product of its digits is 12597120, while the sum is 59.

The square root of 6499229945 is about 80617.8016631563. The cubic root of 6499229945 is about 1866.1818770653.

Subtracting from 6499229945 its reverse (5499229946), we obtain a palindrome (999999999).

The spelling of 6499229945 in words is "six billion, four hundred ninety-nine million, two hundred twenty-nine thousand, nine hundred forty-five".