64198915 has 16 divisors (see below), whose sum is σ = 84208896. Its totient is φ = 46597600.

The previous prime is 64198913. The next prime is 64198949. The reversal of 64198915 is 51989146.

64198915 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64198915 - 2¹ = 64198913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64198913) 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 15 ways as a sum of consecutive naturals, for example, 40080 + ... + 41650.

It is an arithmetic number, because the mean of its divisors is an integer number (5263056).

Almost surely, 2^64198915 is an apocalyptic number.

64198915 is a deficient number, since it is larger than the sum of its proper divisors (20009981).

64198915 is a wasteful number, since it uses less digits than its factorization.

64198915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330.

The product of its digits is 77760, while the sum is 43.

The square root of 64198915 is about 8012.4225425273. The cubic root of 64198915 is about 400.4139776584.

The spelling of 64198915 in words is "sixty-four million, one hundred ninety-eight thousand, nine hundred fifteen".