161871533204700 has 72 divisors (see below), whose sum is σ = 510925421180160. Its totient is φ = 39241583806400.

The previous prime is 161871533204669. The next prime is 161871533204753. The reversal of 161871533204700 is 7402335178161.

161871533204700 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161871533204700.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24525986580 + ... + 24525993179.

It is an arithmetic number, because the mean of its divisors is an integer number (7096186405280).

Almost surely, 2^{161871533204700} is an apocalyptic number.

161871533204700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161871533204700 is an abundant number, since it is smaller than the sum of its proper divisors (349053887975460).

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

161871533204700 is a wasteful number, since it uses less digits than its factorization.

161871533204700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49051979787 (or 49051979780 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 161871533204700 in words is "one hundred sixty-one trillion, eight hundred seventy-one billion, five hundred thirty-three million, two hundred four thousand, seven hundred".