161985754238610 has 16 divisors (see below), whose sum is σ = 388765810172736. Its totient is φ = 43196201130288.

The previous prime is 161985754238591. The next prime is 161985754238681. The reversal of 161985754238610 is 16832457589161.

161985754238610 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 2699762570614 + ... + 2699762570673.

It is an arithmetic number, because the mean of its divisors is an integer number (24297863135796).

It is a 1-persistent number, because it is pandigital, but 2⋅161985754238610 = 323971508477220 is not.

Almost surely, 2^{161985754238610} is an apocalyptic number.

161985754238610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161985754238610 is an abundant number, since it is smaller than the sum of its proper divisors (226780055934126).

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

161985754238610 is a wasteful number, since it uses less digits than its factorization.

161985754238610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5399525141297.

The product of its (nonzero) digits is 87091200, while the sum is 66.

The spelling of 161985754238610 in words is "one hundred sixty-one trillion, nine hundred eighty-five billion, seven hundred fifty-four million, two hundred thirty-eight thousand, six hundred ten".