161767868 has 6 divisors (see below), whose sum is σ = 283093776. Its totient is φ = 80883932.

The previous prime is 161767861. The next prime is 161767873. The reversal of 161767868 is 868767161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161767861) 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 as a sum of consecutive naturals, namely, 20220980 + ... + 20220987.

It is an arithmetic number, because the mean of its divisors is an integer number (47182296).

Almost surely, 2^161767868 is an apocalyptic number.

It is an amenable number.

161767868 is a deficient number, since it is larger than the sum of its proper divisors (121325908).

161767868 is a wasteful number, since it uses less digits than its factorization.

161767868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40441971 (or 40441969 counting only the distinct ones).

The product of its digits is 677376, while the sum is 50.

The square root of 161767868 is about 12718.7997861433. The cubic root of 161767868 is about 544.8756757069.

The spelling of 161767868 in words is "one hundred sixty-one million, seven hundred sixty-seven thousand, eight hundred sixty-eight".