163390279680 has 416 divisors, whose sum is σ = 584263374720. Its totient is φ = 43316674560.

The previous prime is 163390279667. The next prime is 163390279687. The reversal of 163390279680 is 86972093361.

163390279680 is a `hidden beast` number, since 163 + 390 + 2 + 7 + 96 + 8 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163390279687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106720515 + ... + 106722045.

Almost surely, 2^163390279680 is an apocalyptic number.

163390279680 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 163390279680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292131687360).

163390279680 is an abundant number, since it is smaller than the sum of its proper divisors (420873095040).

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

163390279680 is a wasteful number, since it uses less digits than its factorization.

163390279680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1734 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The spelling of 163390279680 in words is "one hundred sixty-three billion, three hundred ninety million, two hundred seventy-nine thousand, six hundred eighty".