161850835272 has 32 divisors (see below), whose sum is σ = 462430958400. Its totient is φ = 46243095744.

The previous prime is 161850835249. The next prime is 161850835313. The reversal of 161850835272 is 272538058161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481698747 + ... + 481699082.

It is an arithmetic number, because the mean of its divisors is an integer number (14450967450).

Almost surely, 2^161850835272 is an apocalyptic number.

161850835272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161850835272 is an abundant number, since it is smaller than the sum of its proper divisors (300580123128).

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

161850835272 is a wasteful number, since it uses less digits than its factorization.

161850835272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963397845 (or 963397841 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 161850835272 in words is "one hundred sixty-one billion, eight hundred fifty million, eight hundred thirty-five thousand, two hundred seventy-two".