163648815 has 16 divisors (see below), whose sum is σ = 285641856. Its totient is φ = 79344800.

The previous prime is 163648813. The next prime is 163648871. The reversal of 163648815 is 518846361.

It is not a de Polignac number, because 163648815 - 2¹ = 163648813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163648813) 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, 495741 + ... + 496070.

It is an arithmetic number, because the mean of its divisors is an integer number (17852616).

Almost surely, 2^163648815 is an apocalyptic number.

163648815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163648815 is a deficient number, since it is larger than the sum of its proper divisors (121993041).

163648815 is a wasteful number, since it uses less digits than its factorization.

163648815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991830.

The product of its digits is 138240, while the sum is 42.

The square root of 163648815 is about 12792.5296560141. The cubic root of 163648815 is about 546.9793804134.

The spelling of 163648815 in words is "one hundred sixty-three million, six hundred forty-eight thousand, eight hundred fifteen".