6531856172 has 6 divisors (see below), whose sum is σ = 11430748308. Its totient is φ = 3265928084.

The previous prime is 6531856153. The next prime is 6531856187. The reversal of 6531856172 is 2716581356.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 816482018 + ... + 816482025.

It is an arithmetic number, because the mean of its divisors is an integer number (1905124718).

Almost surely, 2^6531856172 is an apocalyptic number.

It is an amenable number.

6531856172 is a deficient number, since it is larger than the sum of its proper divisors (4898892136).

6531856172 is a wasteful number, since it uses less digits than its factorization.

6531856172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632964047 (or 1632964045 counting only the distinct ones).

The product of its digits is 302400, while the sum is 44.

The square root of 6531856172 is about 80819.8996039960. The cubic root of 6531856172 is about 1869.2994193792.

The spelling of 6531856172 in words is "six billion, five hundred thirty-one million, eight hundred fifty-six thousand, one hundred seventy-two".