161550663120 has 960 divisors, whose sum is σ = 719411097600. Its totient is φ = 31472271360.

The previous prime is 161550663061. The next prime is 161550663121. The reversal of 161550663120 is 21366055161.

161550663120 is a `hidden beast` number, since 1 + 6 + 15 + 5 + 0 + 6 + 631 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161550663121) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 108495336 + ... + 108496824.

It is an arithmetic number, because the mean of its divisors is an integer number (749386560).

Almost surely, 2^161550663120 is an apocalyptic number.

161550663120 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 161550663120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (359705548800).

161550663120 is an abundant number, since it is smaller than the sum of its proper divisors (557860434480).

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

161550663120 is a wasteful number, since it uses less digits than its factorization.

161550663120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 161550663120 in words is "one hundred sixty-one billion, five hundred fifty million, six hundred sixty-three thousand, one hundred twenty".