6531312132665 has 8 divisors (see below), whose sum is σ = 7841684468160. Its totient is φ = 5222309766832.

The previous prime is 6531312132623. The next prime is 6531312132671. The reversal of 6531312132665 is 5662312131356.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6531312132665 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342481925 + ... + 342500994.

It is an arithmetic number, because the mean of its divisors is an integer number (980210558520).

Almost surely, 2^{6531312132665} is an apocalyptic number.

It is an amenable number.

6531312132665 is a deficient number, since it is larger than the sum of its proper divisors (1310372335495).

6531312132665 is a wasteful number, since it uses less digits than its factorization.

6531312132665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684984831.

The product of its digits is 583200, while the sum is 44.

The spelling of 6531312132665 in words is "six trillion, five hundred thirty-one billion, three hundred twelve million, one hundred thirty-two thousand, six hundred sixty-five".