161322768 has 60 divisors (see below), whose sum is σ = 475249840. Its totient is φ = 50943168.

The previous prime is 161322731. The next prime is 161322769. The reversal of 161322768 is 867223161.

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

It is not an unprimeable number, because it can be changed into a prime (161322769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26746 + ... + 32217.

Almost surely, 2^161322768 is an apocalyptic number.

161322768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161322768 is an abundant number, since it is smaller than the sum of its proper divisors (313927072).

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

161322768 is a wasteful number, since it uses less digits than its factorization.

161322768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58996 (or 58987 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 161322768 is about 12701.2900132231. The cubic root of 161322768 is about 544.3754796753.

The spelling of 161322768 in words is "one hundred sixty-one million, three hundred twenty-two thousand, seven hundred sixty-eight".