161938034104 has 128 divisors (see below), whose sum is σ = 401033203200. Its totient is φ = 59350487040.

The previous prime is 161938034101. The next prime is 161938034123. The reversal of 161938034104 is 401430839161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161938034101) 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 31 ways as a sum of consecutive naturals, for example, 33120492 + ... + 33125380.

It is an arithmetic number, because the mean of its divisors is an integer number (3133071900).

Almost surely, 2^161938034104 is an apocalyptic number.

161938034104 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 161938034104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (200516601600).

161938034104 is an abundant number, since it is smaller than the sum of its proper divisors (239095169096).

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

161938034104 is a wasteful number, since it uses less digits than its factorization.

161938034104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093 (or 8089 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The spelling of 161938034104 in words is "one hundred sixty-one billion, nine hundred thirty-eight million, thirty-four thousand, one hundred four".