163869031872 has 672 divisors, whose sum is σ = 644381337600. Its totient is φ = 38531137536.

The previous prime is 163869031871. The next prime is 163869031873. The reversal of 163869031872 is 278130968361.

163869031872 is a `hidden beast` number, since 163 + 86 + 90 + 318 + 7 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (163869031871) and next prime (163869031873).

It is a tau number, because it is divible by the number of its divisors (672).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163869031871) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 16925529 + ... + 16935207.

It is an arithmetic number, because the mean of its divisors is an integer number (958900800).

Almost surely, 2^163869031872 is an apocalyptic number.

163869031872 is a gapful number since it is divisible by the number (12) 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 163869031872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322190668800).

163869031872 is an abundant number, since it is smaller than the sum of its proper divisors (480512305728).

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

163869031872 is a wasteful number, since it uses less digits than its factorization.

163869031872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9753 (or 9740 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 163869031872 in words is "one hundred sixty-three billion, eight hundred sixty-nine million, thirty-one thousand, eight hundred seventy-two".