161004382280 has 192 divisors, whose sum is σ = 431990159040. Its totient is φ = 53819555328.

The previous prime is 161004382241. The next prime is 161004382291. The reversal of 161004382280 is 82283400161.

161004382280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161004382280² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 161004382280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57561842 + ... + 57564638.

It is an arithmetic number, because the mean of its divisors is an integer number (2249948745).

Almost surely, 2^161004382280 is an apocalyptic number.

161004382280 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 161004382280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215995079520).

161004382280 is an abundant number, since it is smaller than the sum of its proper divisors (270985776760).

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

161004382280 is a wasteful number, since it uses less digits than its factorization.

161004382280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3548 (or 3537 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The spelling of 161004382280 in words is "one hundred sixty-one billion, four million, three hundred eighty-two thousand, two hundred eighty".