161087322661650 has 1728 divisors, whose sum is σ = 601350971360256. Its totient is φ = 30433148928000.

The previous prime is 161087322661637. The next prime is 161087322661739. The reversal of 161087322661650 is 56166223780161.

It is a happy number.

161087322661650 is a `hidden beast` number, since 1 + 6 + 10 + 8 + 7 + 3 + 2 + 2 + 6 + 616 + 5 + 0 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 863 ways as a sum of consecutive naturals, for example, 139711467474 + ... + 139711468626.

It is an arithmetic number, because the mean of its divisors is an integer number (348004034352).

Almost surely, 2^{161087322661650} is an apocalyptic number.

161087322661650 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 161087322661650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300675485680128).

161087322661650 is an abundant number, since it is smaller than the sum of its proper divisors (440263648698606).

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

161087322661650 is a wasteful number, since it uses less digits than its factorization.

161087322661650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337 (or 2322 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 161087322661650 in words is "one hundred sixty-one trillion, eighty-seven billion, three hundred twenty-two million, six hundred sixty-one thousand, six hundred fifty".