163944168157 has 16 divisors (see below), whose sum is σ = 204437020032. Its totient is φ = 127724267520.

The previous prime is 163944168079. The next prime is 163944168197. The reversal of 163944168157 is 751861449361.

It is a cyclic number.

It is not a de Polignac number, because 163944168157 - 2⁷ = 163944168029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163944168098 and 163944168107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163944168197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206893 + ... + 608845.

It is an arithmetic number, because the mean of its divisors is an integer number (12777313752).

Almost surely, 2^163944168157 is an apocalyptic number.

It is an amenable number.

163944168157 is a deficient number, since it is larger than the sum of its proper divisors (40492851875).

163944168157 is a wasteful number, since it uses less digits than its factorization.

163944168157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407268.

The product of its digits is 4354560, while the sum is 55.

The spelling of 163944168157 in words is "one hundred sixty-three billion, nine hundred forty-four million, one hundred sixty-eight thousand, one hundred fifty-seven".