161327438000 has 80 divisors (see below), whose sum is σ = 390203763456. Its totient is φ = 64512115200.

The previous prime is 161327437951. The next prime is 161327438023. The reversal of 161327438000 is 834723161.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8296289 + ... + 8315711.

Almost surely, 2^161327438000 is an apocalyptic number.

161327438000 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 161327438000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195101881728).

161327438000 is an abundant number, since it is smaller than the sum of its proper divisors (228876325456).

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

161327438000 is a wasteful number, since it uses less digits than its factorization.

161327438000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23599 (or 23583 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 161327438000 in words is "one hundred sixty-one billion, three hundred twenty-seven million, four hundred thirty-eight thousand".