161056744884 has 144 divisors (see below), whose sum is σ = 467749900800. Its totient is φ = 45772051968.

The previous prime is 161056744879. The next prime is 161056744909. The reversal of 161056744884 is 488447650161.

161056744884 is a `hidden beast` number, since 1 + 61 + 0 + 5 + 67 + 448 + 84 = 666.

161056744884 is a modest number, since divided by 744884 gives 161056 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 161056744884.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50187472 + ... + 50190680.

It is an arithmetic number, because the mean of its divisors is an integer number (3248263200).

Almost surely, 2^161056744884 is an apocalyptic number.

161056744884 is a gapful number since it is divisible by the number (14) 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 161056744884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233874950400).

161056744884 is an abundant number, since it is smaller than the sum of its proper divisors (306693155916).

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

161056744884 is a wasteful number, since it uses less digits than its factorization.

161056744884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222 (or 4217 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 54.

The spelling of 161056744884 in words is "one hundred sixty-one billion, fifty-six million, seven hundred forty-four thousand, eight hundred eighty-four".