163657191089 has 16 divisors (see below), whose sum is σ = 189148743168. Its totient is φ = 138696440832.

The previous prime is 163657191059. The next prime is 163657191097. The reversal of 163657191089 is 980191756361.

163657191089 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 163657191089 - 2⁸ = 163657190833 is a prime.

It is a super-2 number, since 2×163657191089² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (163657191059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 584744 + ... + 818070.

It is an arithmetic number, because the mean of its divisors is an integer number (11821796448).

Almost surely, 2^163657191089 is an apocalyptic number.

It is an amenable number.

163657191089 is a deficient number, since it is larger than the sum of its proper divisors (25491552079).

163657191089 is a wasteful number, since it uses less digits than its factorization.

163657191089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234464.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 163657191089 in words is "one hundred sixty-three billion, six hundred fifty-seven million, one hundred ninety-one thousand, eighty-nine".