163985458500 has 384 divisors, whose sum is σ = 551835648000. Its totient is φ = 41999472000.

The previous prime is 163985458453. The next prime is 163985458537. The reversal of 163985458500 is 5854589361.

163985458500 is a `hidden beast` number, since 1 + 6 + 3 + 9 + 8 + 54 + 585 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 58170091 + ... + 58172909.

It is an arithmetic number, because the mean of its divisors is an integer number (1437072000).

Almost surely, 2^163985458500 is an apocalyptic number.

163985458500 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 163985458500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275917824000).

163985458500 is an abundant number, since it is smaller than the sum of its proper divisors (387850189500).

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

163985458500 is a wasteful number, since it uses less digits than its factorization.

163985458500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3017 (or 2999 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 54.

The spelling of 163985458500 in words is "one hundred sixty-three billion, nine hundred eighty-five million, four hundred fifty-eight thousand, five hundred".