163815540375 has 16 divisors (see below), whose sum is σ = 272589059808. Its totient is φ = 87368288000.

The previous prime is 163815540353. The next prime is 163815540379. The reversal of 163815540375 is 573045518361.

It is not a de Polignac number, because 163815540375 - 2⁷ = 163815540247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163815540379) 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, 218420346 + ... + 218421095.

It is an arithmetic number, because the mean of its divisors is an integer number (17036816238).

Almost surely, 2^163815540375 is an apocalyptic number.

163815540375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163815540375 is a deficient number, since it is larger than the sum of its proper divisors (108773519433).

163815540375 is an equidigital number, since it uses as much as digits as its factorization.

163815540375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436841459 (or 436841449 counting only the distinct ones).

The product of its (nonzero) digits is 1512000, while the sum is 48.

The spelling of 163815540375 in words is "one hundred sixty-three billion, eight hundred fifteen million, five hundred forty thousand, three hundred seventy-five".