646015161 has 8 divisors (see below), whose sum is σ = 939658464. Its totient is φ = 391524320.

The previous prime is 646015159. The next prime is 646015163. The reversal of 646015161 is 161510646.

It is an interprime number because it is at equal distance from previous prime (646015159) and next prime (646015163).

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

It is not a de Polignac number, because 646015161 - 2¹ = 646015159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (646015163) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 9788076 + ... + 9788141.

It is an arithmetic number, because the mean of its divisors is an integer number (117457308).

Almost surely, 2^646015161 is an apocalyptic number.

It is an amenable number.

646015161 is a deficient number, since it is larger than the sum of its proper divisors (293643303).

646015161 is a wasteful number, since it uses less digits than its factorization.

646015161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19576231.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 646015161 is about 25416.8283033112. The cubic root of 646015161 is about 864.4653097927.

The spelling of 646015161 in words is "six hundred forty-six million, fifteen thousand, one hundred sixty-one".