161033881874 has 8 divisors (see below), whose sum is σ = 241560703488. Its totient is φ = 80513647380.

The previous prime is 161033881861. The next prime is 161033881901. The reversal of 161033881874 is 478188330161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161033881874² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1585202 + ... + 1683725.

It is an arithmetic number, because the mean of its divisors is an integer number (30195087936).

Almost surely, 2^161033881874 is an apocalyptic number.

161033881874 is a deficient number, since it is larger than the sum of its proper divisors (80526821614).

161033881874 is a wasteful number, since it uses less digits than its factorization.

161033881874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3293560.

The product of its (nonzero) digits is 774144, while the sum is 50.

The spelling of 161033881874 in words is "one hundred sixty-one billion, thirty-three million, eight hundred eighty-one thousand, eight hundred seventy-four".