161835508000 has 48 divisors (see below), whose sum is σ = 397629852984. Its totient is φ = 64734201600.

The previous prime is 161835507997. The next prime is 161835508027. The reversal of 161835508000 is 805538161.

It can be written as a sum of positive squares in 4 ways, for example, as 25322993424 + 136512514576 = 159132^2 + 369476^2 .

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, 20225439 + ... + 20233438.

Almost surely, 2^161835508000 is an apocalyptic number.

161835508000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161835508000 is an abundant number, since it is smaller than the sum of its proper divisors (235794344984).

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

161835508000 is an equidigital number, since it uses as much as digits as its factorization.

161835508000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40458902 (or 40458884 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 161835508000 in words is "one hundred sixty-one billion, eight hundred thirty-five million, five hundred eight thousand".