163858012920 has 288 divisors, whose sum is σ = 620703036720. Its totient is φ = 37379543040.

The previous prime is 163858012907. The next prime is 163858012937. The reversal of 163858012920 is 29210858361.

163858012920 is a `hidden beast` number, since 1 + 6 + 38 + 580 + 12 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9216840 + ... + 9234600.

Almost surely, 2^163858012920 is an apocalyptic number.

163858012920 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 163858012920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310351518360).

163858012920 is an abundant number, since it is smaller than the sum of its proper divisors (456845023800).

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

163858012920 is a wasteful number, since it uses less digits than its factorization.

163858012920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18315 (or 18301 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 163858012920 in words is "one hundred sixty-three billion, eight hundred fifty-eight million, twelve thousand, nine hundred twenty".