163887099840 has 336 divisors, whose sum is σ = 607194372096. Its totient is φ = 40454092800.

The previous prime is 163887099823. The next prime is 163887099847. The reversal of 163887099840 is 48990788361.

It is a super-2 number, since 2×163887099840² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163887099847) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2013535 + ... + 2093345.

Almost surely, 2^163887099840 is an apocalyptic number.

163887099840 is a gapful number since it is divisible by the number (10) 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 163887099840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303597186048).

163887099840 is an abundant number, since it is smaller than the sum of its proper divisors (443307272256).

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

163887099840 is a wasteful number, since it uses less digits than its factorization.

163887099840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79888 (or 79875 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 163887099840 in words is "one hundred sixty-three billion, eight hundred eighty-seven million, ninety-nine thousand, eight hundred forty".