163393128405 has 72 divisors (see below), whose sum is σ = 306899450208. Its totient is φ = 80381179008.

The previous prime is 163393128401. The next prime is 163393128469. The reversal of 163393128405 is 504821393361.

163393128405 is a `hidden beast` number, since 1 + 6 + 33 + 93 + 128 + 405 = 666.

It is not a de Polignac number, because 163393128405 - 2² = 163393128401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163393128401) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11575362 + ... + 11589468.

It is an arithmetic number, because the mean of its divisors is an integer number (4262492364).

Almost surely, 2^163393128405 is an apocalyptic number.

163393128405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163393128405 is a deficient number, since it is larger than the sum of its proper divisors (143506321803).

163393128405 is a wasteful number, since it uses less digits than its factorization.

163393128405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15667 (or 15651 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 163393128405 in words is "one hundred sixty-three billion, three hundred ninety-three million, one hundred twenty-eight thousand, four hundred five".