161849300635840 has 224 divisors, whose sum is σ = 393046468850880. Its totient is φ = 63465489432576.

The previous prime is 161849300635817. The next prime is 161849300635873. The reversal of 161849300635840 is 48536003948161.

It is a super-2 number, since 2×161849300635840² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12731001324 + ... + 12731014036.

Almost surely, 2^{161849300635840} is an apocalyptic number.

161849300635840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161849300635840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196523234425440).

161849300635840 is an abundant number, since it is smaller than the sum of its proper divisors (231197168215040).

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

161849300635840 is a wasteful number, since it uses less digits than its factorization.

161849300635840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15619 (or 15609 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 161849300635840 in words is "one hundred sixty-one trillion, eight hundred forty-nine billion, three hundred million, six hundred thirty-five thousand, eight hundred forty".