161514891180 has 288 divisors, whose sum is σ = 518807697408. Its totient is φ = 40608691200.

The previous prime is 161514891163. The next prime is 161514891217. The reversal of 161514891180 is 81198415161.

It is a happy number.

161514891180 is a `hidden beast` number, since 1 + 6 + 1 + 51 + 489 + 118 + 0 = 666.

161514891180 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 95 ways as a sum of consecutive naturals, for example, 148042435 + ... + 148043525.

It is an arithmetic number, because the mean of its divisors is an integer number (1801415616).

Almost surely, 2^161514891180 is an apocalyptic number.

161514891180 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 161514891180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259403848704).

161514891180 is an abundant number, since it is smaller than the sum of its proper divisors (357292806228).

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

161514891180 is a wasteful number, since it uses less digits than its factorization.

161514891180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797 (or 1792 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 45.

The spelling of 161514891180 in words is "one hundred sixty-one billion, five hundred fourteen million, eight hundred ninety-one thousand, one hundred eighty".