6451631487 has 12 divisors (see below), whose sum is σ = 10650312400. Its totient is φ = 3686646528.

The previous prime is 6451631477. The next prime is 6451631521. The reversal of 6451631487 is 7841361546.

6451631487 is a `hidden beast` number, since 6 + 4 + 5 + 1 + 631 + 4 + 8 + 7 = 666.

It is not a de Polignac number, because 6451631487 - 2¹¹ = 6451629439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6451631437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51203362 + ... + 51203487.

Almost surely, 2^6451631487 is an apocalyptic number.

6451631487 is a deficient number, since it is larger than the sum of its proper divisors (4198680913).

6451631487 is a wasteful number, since it uses less digits than its factorization.

6451631487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102406862 (or 102406859 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 6451631487 is about 80322.0485732280. The cubic root of 6451631487 is about 1861.6149198691.

The spelling of 6451631487 in words is "six billion, four hundred fifty-one million, six hundred thirty-one thousand, four hundred eighty-seven".