6399848954 has 4 divisors (see below), whose sum is σ = 9599773434. Its totient is φ = 3199924476.

The previous prime is 6399848857. The next prime is 6399848993. The reversal of 6399848954 is 4598489936.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 5413574929 + 986274025 = 73577^2 + 31405^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1599962237 + ... + 1599962240.

Almost surely, 2^6399848954 is an apocalyptic number.

6399848954 is a deficient number, since it is larger than the sum of its proper divisors (3199924480).

6399848954 is a wasteful number, since it uses less digits than its factorization.

6399848954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3199924479.

The product of its digits is 67184640, while the sum is 65.

The square root of 6399848954 is about 79999.0559569299. The cubic root of 6399848954 is about 1856.6209272171.

The spelling of 6399848954 in words is "six billion, three hundred ninety-nine million, eight hundred forty-eight thousand, nine hundred fifty-four".