2531646463 has 4 divisors (see below), whose sum is σ = 2554050528. Its totient is φ = 2509242400.

The previous prime is 2531646451. The next prime is 2531646473. The reversal of 2531646463 is 3646461352.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2531646463 - 2⁹ = 2531645951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531646473) 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 3 ways as a sum of consecutive naturals, for example, 11201863 + ... + 11202088.

It is an arithmetic number, because the mean of its divisors is an integer number (638512632).

Almost surely, 2^2531646463 is an apocalyptic number.

2531646463 is a deficient number, since it is larger than the sum of its proper divisors (22404065).

2531646463 is a wasteful number, since it uses less digits than its factorization.

2531646463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22404064.

The product of its digits is 311040, while the sum is 40.

The square root of 2531646463 is about 50315.4694204476. The cubic root of 2531646463 is about 1362.9115936090.

The spelling of 2531646463 in words is "two billion, five hundred thirty-one million, six hundred forty-six thousand, four hundred sixty-three".