161489305400 has 48 divisors (see below), whose sum is σ = 379333429440. Its totient is φ = 63929779200.

The previous prime is 161489305339. The next prime is 161489305403. The reversal of 161489305400 is 4503984161.

161489305400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161489305403) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 4142696 + ... + 4181495.

It is an arithmetic number, because the mean of its divisors is an integer number (7902779780).

Almost surely, 2^161489305400 is an apocalyptic number.

161489305400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161489305400 is an abundant number, since it is smaller than the sum of its proper divisors (217844124040).

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

161489305400 is a wasteful number, since it uses less digits than its factorization.

161489305400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8324304 (or 8324295 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The spelling of 161489305400 in words is "one hundred sixty-one billion, four hundred eighty-nine million, three hundred five thousand, four hundred".