161267768 has 24 divisors (see below), whose sum is σ = 307642080. Its totient is φ = 79253520.

The previous prime is 161267749. The next prime is 161267773. The reversal of 161267768 is 867762161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24953 + ... + 30743.

It is an arithmetic number, because the mean of its divisors is an integer number (12818420).

Almost surely, 2^161267768 is an apocalyptic number.

It is an amenable number.

161267768 is a deficient number, since it is larger than the sum of its proper divisors (146374312).

161267768 is an equidigital number, since it uses as much as digits as its factorization.

161267768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915 (or 5852 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 161267768 is about 12699.1246942457. The cubic root of 161267768 is about 544.3136077421.

The spelling of 161267768 in words is "one hundred sixty-one million, two hundred sixty-seven thousand, seven hundred sixty-eight".