163881536 has 112 divisors (see below), whose sum is σ = 421599360. Its totient is φ = 61378560.

The previous prime is 163881503. The next prime is 163881541. The reversal of 163881536 is 635188361.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 163881493 and 163881502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109916 + ... + 111396.

It is an arithmetic number, because the mean of its divisors is an integer number (3764280).

Almost surely, 2^163881536 is an apocalyptic number.

163881536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163881536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210799680).

163881536 is an abundant number, since it is smaller than the sum of its proper divisors (257717824).

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

163881536 is a wasteful number, since it uses less digits than its factorization.

163881536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532 (or 1522 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 163881536 is about 12801.6223971808. The cubic root of 163881536 is about 547.2385396291.

The spelling of 163881536 in words is "one hundred sixty-three million, eight hundred eighty-one thousand, five hundred thirty-six".