161838740034 has 72 divisors (see below), whose sum is σ = 371200851840. Its totient is φ = 50947346736.

The previous prime is 161838739987. The next prime is 161838740053. The reversal of 161838740034 is 430047838161.

161838740034 is a `hidden beast` number, since 1 + 61 + 83 + 87 + 400 + 34 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 644667 + ... + 859809.

Almost surely, 2^161838740034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161838740034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185600425920).

161838740034 is an abundant number, since it is smaller than the sum of its proper divisors (209362111806).

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

161838740034 is a wasteful number, since it uses less digits than its factorization.

161838740034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215276 (or 215250 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 161838740034 in words is "one hundred sixty-one billion, eight hundred thirty-eight million, seven hundred forty thousand, thirty-four".