161351323350 has 288 divisors, whose sum is σ = 474421349376. Its totient is φ = 36177523200.

The previous prime is 161351323333. The next prime is 161351323391. The reversal of 161351323350 is 53323153161.

It is a happy number.

161351323350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 143 ways as a sum of consecutive naturals, for example, 121590387 + ... + 121591713.

It is an arithmetic number, because the mean of its divisors is an integer number (1647296352).

Almost surely, 2^161351323350 is an apocalyptic number.

161351323350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161351323350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237210674688).

161351323350 is an abundant number, since it is smaller than the sum of its proper divisors (313070026026).

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

161351323350 is a wasteful number, since it uses less digits than its factorization.

161351323350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 33.

The spelling of 161351323350 in words is "one hundred sixty-one billion, three hundred fifty-one million, three hundred twenty-three thousand, three hundred fifty".