6504561631 has 8 divisors (see below), whose sum is σ = 7031959280. Its totient is φ = 5995669248.

The previous prime is 6504561629. The next prime is 6504561643. The reversal of 6504561631 is 1361654056.

6504561631 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6504561631 - 2¹ = 6504561629 is a prime.

It is a super-2 number, since 2×6504561631² = 84618644022954760322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504561671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4625586 + ... + 4626991.

It is an arithmetic number, because the mean of its divisors is an integer number (878994910).

Almost surely, 2^6504561631 is an apocalyptic number.

6504561631 is a deficient number, since it is larger than the sum of its proper divisors (527397649).

6504561631 is a wasteful number, since it uses less digits than its factorization.

6504561631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9252633.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 6504561631 is about 80650.8625558338. The cubic root of 6504561631 is about 1866.6920491057.

The spelling of 6504561631 in words is "six billion, five hundred four million, five hundred sixty-one thousand, six hundred thirty-one".