161841439480 has 96 divisors (see below), whose sum is σ = 425962573200. Its totient is φ = 55178382336.

The previous prime is 161841439453. The next prime is 161841439489. The reversal of 161841439480 is 84934148161.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161841439489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120192 + ... + 581488.

Almost surely, 2^161841439480 is an apocalyptic number.

161841439480 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 161841439480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212981286600).

161841439480 is an abundant number, since it is smaller than the sum of its proper divisors (264121133720).

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

161841439480 is a wasteful number, since it uses less digits than its factorization.

161841439480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461501 (or 461490 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 161841439480 in words is "one hundred sixty-one billion, eight hundred forty-one million, four hundred thirty-nine thousand, four hundred eighty".