646682116827 has 8 divisors (see below), whose sum is σ = 862433898064. Its totient is φ = 431025873408.

The previous prime is 646682116819. The next prime is 646682116849. The reversal of 646682116827 is 728611286646.

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

It is not a de Polignac number, because 646682116827 - 2³ = 646682116819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646682116867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23868658 + ... + 23895735.

It is an arithmetic number, because the mean of its divisors is an integer number (107804237258).

Almost surely, 2^646682116827 is an apocalyptic number.

646682116827 is a deficient number, since it is larger than the sum of its proper divisors (215751781237).

646682116827 is a wasteful number, since it uses less digits than its factorization.

646682116827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47768909.

The product of its digits is 9289728, while the sum is 57.

The spelling of 646682116827 in words is "six hundred forty-six billion, six hundred eighty-two million, one hundred sixteen thousand, eight hundred twenty-seven".