161247602880 has 896 divisors, whose sum is σ = 710799452160. Its totient is φ = 33502740480.

The previous prime is 161247602869. The next prime is 161247602909. The reversal of 161247602880 is 88206742161.

161247602880 is a `hidden beast` number, since 1 + 612 + 4 + 7 + 6 + 0 + 28 + 8 + 0 = 666.

161247602880 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

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, 52676550 + ... + 52679610.

It is an arithmetic number, because the mean of its divisors is an integer number (793302960).

Almost surely, 2^161247602880 is an apocalyptic number.

161247602880 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 161247602880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355399726080).

161247602880 is an abundant number, since it is smaller than the sum of its proper divisors (549551849280).

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

161247602880 is a wasteful number, since it uses less digits than its factorization.

161247602880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174 (or 3158 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 161247602880 in words is "one hundred sixty-one billion, two hundred forty-seven million, six hundred two thousand, eight hundred eighty".