6503123631 has 16 divisors (see below), whose sum is σ = 8711103744. Its totient is φ = 4315305984.

The previous prime is 6503123629. The next prime is 6503123639. The reversal of 6503123631 is 1363213056.

It is a happy number.

It is not a de Polignac number, because 6503123631 - 2¹ = 6503123629 is a prime.

It is a super-3 number, since 3×6503123631³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6503123639) 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 in 15 ways as a sum of consecutive naturals, for example, 1468086 + ... + 1472508.

It is an arithmetic number, because the mean of its divisors is an integer number (544443984).

Almost surely, 2^6503123631 is an apocalyptic number.

6503123631 is a deficient number, since it is larger than the sum of its proper divisors (2207980113).

6503123631 is a wasteful number, since it uses less digits than its factorization.

6503123631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 6503123631 is about 80641.9470933087. The cubic root of 6503123631 is about 1866.5544789329.

Adding to 6503123631 its reverse (1363213056), we get a palindrome (7866336687).

The spelling of 6503123631 in words is "six billion, five hundred three million, one hundred twenty-three thousand, six hundred thirty-one".