646601610115 has 4 divisors (see below), whose sum is σ = 775921932144. Its totient is φ = 517281288088.

The previous prime is 646601610107. The next prime is 646601610131. The reversal of 646601610115 is 511016106646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646601610115 - 2³ = 646601610107 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64660161007 + ... + 64660161016.

It is an arithmetic number, because the mean of its divisors is an integer number (193980483036).

Almost surely, 2^646601610115 is an apocalyptic number.

646601610115 is a deficient number, since it is larger than the sum of its proper divisors (129320322029).

646601610115 is a wasteful number, since it uses less digits than its factorization.

646601610115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129320322028.

The product of its (nonzero) digits is 25920, while the sum is 37.

The spelling of 646601610115 in words is "six hundred forty-six billion, six hundred one million, six hundred ten thousand, one hundred fifteen".