646575271167 has 8 divisors (see below), whose sum is σ = 985257556096. Its totient is φ = 369471583512.

The previous prime is 646575271163. The next prime is 646575271171. The reversal of 646575271167 is 761172575646.

It is an interprime number because it is at equal distance from previous prime (646575271163) and next prime (646575271171).

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

It is not a de Polignac number, because 646575271167 - 2² = 646575271163 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 (646575271163) 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, 15394649293 + ... + 15394649334.

It is an arithmetic number, because the mean of its divisors is an integer number (123157194512).

Almost surely, 2^646575271167 is an apocalyptic number.

646575271167 is a deficient number, since it is larger than the sum of its proper divisors (338682284929).

646575271167 is a wasteful number, since it uses less digits than its factorization.

646575271167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30789298637.

The product of its digits is 14817600, while the sum is 57.

The spelling of 646575271167 in words is "six hundred forty-six billion, five hundred seventy-five million, two hundred seventy-one thousand, one hundred sixty-seven".