161067816 has 288 divisors, whose sum is σ = 566392320. Its totient is φ = 40435200.

The previous prime is 161067757. The next prime is 161067871. The reversal of 161067816 is 618760161.

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

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 2640426 + ... + 2640486.

It is an arithmetic number, because the mean of its divisors is an integer number (1966640).

Almost surely, 2^161067816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161067816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283196160).

161067816 is an abundant number, since it is smaller than the sum of its proper divisors (405324504).

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

161067816 is a wasteful number, since it uses less digits than its factorization.

161067816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 161067816 is about 12691.2495838668. The cubic root of 161067816 is about 544.0885542836.

The spelling of 161067816 in words is "one hundred sixty-one million, sixty-seven thousand, eight hundred sixteen".