161156366 has 32 divisors (see below), whose sum is σ = 294528000. Its totient is φ = 64595232.

The previous prime is 161156353. The next prime is 161156371. The reversal of 161156366 is 663651161.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 17180 + ... + 24848.

It is an arithmetic number, because the mean of its divisors is an integer number (9204000).

Almost surely, 2^161156366 is an apocalyptic number.

161156366 is a deficient number, since it is larger than the sum of its proper divisors (133371634).

161156366 is a wasteful number, since it uses less digits than its factorization.

161156366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7776.

The product of its digits is 19440, while the sum is 35.

The square root of 161156366 is about 12694.7377286811. The cubic root of 161156366 is about 544.1882435868.

The spelling of 161156366 in words is "one hundred sixty-one million, one hundred fifty-six thousand, three hundred sixty-six".