161348534172 has 180 divisors, whose sum is σ = 490980049560. Its totient is φ = 46069684416.

The previous prime is 161348534167. The next prime is 161348534213. The reversal of 161348534172 is 271435843161.

161348534172 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 48 + 534 + 1 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 39037018 + ... + 39041150.

It is an arithmetic number, because the mean of its divisors is an integer number (2727666942).

Almost surely, 2^161348534172 is an apocalyptic number.

161348534172 is a gapful number since it is divisible by the number (12) 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 161348534172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (245490024780).

161348534172 is an abundant number, since it is smaller than the sum of its proper divisors (329631515388).

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

161348534172 is a wasteful number, since it uses less digits than its factorization.

161348534172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6622 (or 6604 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 161348534172 in words is "one hundred sixty-one billion, three hundred forty-eight million, five hundred thirty-four thousand, one hundred seventy-two".