163391854605 has 192 divisors, whose sum is σ = 339852568320. Its totient is φ = 66421555200.

The previous prime is 163391854601. The next prime is 163391854609. The reversal of 163391854605 is 506458193361.

It is an interprime number because it is at equal distance from previous prime (163391854601) and next prime (163391854609).

It is not a de Polignac number, because 163391854605 - 2² = 163391854601 is a prime.

It is a super-2 number, since 2×163391854605² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163391854601) 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 191 ways as a sum of consecutive naturals, for example, 123687345 + ... + 123688665.

It is an arithmetic number, because the mean of its divisors is an integer number (1770065460).

Almost surely, 2^163391854605 is an apocalyptic number.

163391854605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163391854605 is an abundant number, since it is smaller than the sum of its proper divisors (176460713715).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163391854605 is a wasteful number, since it uses less digits than its factorization.

163391854605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900 (or 1893 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 51.

The spelling of 163391854605 in words is "one hundred sixty-three billion, three hundred ninety-one million, eight hundred fifty-four thousand, six hundred five".