6406599603 has 16 divisors (see below), whose sum is σ = 8686444032. Its totient is φ = 4198980000.

The previous prime is 6406599559. The next prime is 6406599611. The reversal of 6406599603 is 3069956046.

It is a happy number.

It is not a de Polignac number, because 6406599603 - 2⁶ = 6406599539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6406599673) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 422788 + ... + 437678.

It is an arithmetic number, because the mean of its divisors is an integer number (542902752).

Almost surely, 2^6406599603 is an apocalyptic number.

6406599603 is a deficient number, since it is larger than the sum of its proper divisors (2279844429).

6406599603 is a wasteful number, since it uses less digits than its factorization.

6406599603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17306.

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 6406599603 is about 80041.2368907428. The cubic root of 6406599603 is about 1857.2734942843.

The spelling of 6406599603 in words is "six billion, four hundred six million, five hundred ninety-nine thousand, six hundred three".