161884085528 has 32 divisors (see below), whose sum is σ = 334405037520. Its totient is φ = 72855120000.

The previous prime is 161884085521. The next prime is 161884085543. The reversal of 161884085528 is 825580488161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161884085521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9098003 + ... + 9115778.

Almost surely, 2^161884085528 is an apocalyptic number.

It is an amenable number.

161884085528 is an abundant number, since it is smaller than the sum of its proper divisors (172520951992).

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

161884085528 is a wasteful number, since it uses less digits than its factorization.

161884085528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18213899 (or 18213895 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 56.

The spelling of 161884085528 in words is "one hundred sixty-one billion, eight hundred eighty-four million, eighty-five thousand, five hundred twenty-eight".