646412115 has 16 divisors (see below), whose sum is σ = 1053775008. Its totient is φ = 338247936.

The previous prime is 646412113. The next prime is 646412159. The reversal of 646412115 is 511214646.

It is not a de Polignac number, because 646412115 - 2¹ = 646412113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646412113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405754 + ... + 407343.

It is an arithmetic number, because the mean of its divisors is an integer number (65860938).

Almost surely, 2^646412115 is an apocalyptic number.

646412115 is a deficient number, since it is larger than the sum of its proper divisors (407362893).

646412115 is a wasteful number, since it uses less digits than its factorization.

646412115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813158.

The product of its digits is 5760, while the sum is 30.

The square root of 646412115 is about 25424.6359855948. The cubic root of 646412115 is about 864.6423348958.

The spelling of 646412115 in words is "six hundred forty-six million, four hundred twelve thousand, one hundred fifteen".