6531616532 has 48 divisors (see below), whose sum is σ = 13133352960. Its totient is φ = 2784288000.

The previous prime is 6531616501. The next prime is 6531616591. The reversal of 6531616532 is 2356161356.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5674157 + ... + 5675307.

It is an arithmetic number, because the mean of its divisors is an integer number (273611520).

Almost surely, 2^6531616532 is an apocalyptic number.

It is an amenable number.

6531616532 is an abundant number, since it is smaller than the sum of its proper divisors (6601736428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6531616532 is a wasteful number, since it uses less digits than its factorization.

6531616532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2070 counting only the distinct ones).

The product of its digits is 97200, while the sum is 38.

The square root of 6531616532 is about 80818.4170347329. The cubic root of 6531616532 is about 1869.2765588845.

Adding to 6531616532 its reverse (2356161356), we get a palindrome (8887777888).

The spelling of 6531616532 in words is "six billion, five hundred thirty-one million, six hundred sixteen thousand, five hundred thirty-two".