161216363 has 32 divisors (see below), whose sum is σ = 209599488. Its totient is φ = 120355200.

The previous prime is 161216359. The next prime is 161216369. The reversal of 161216363 is 363612161.

It is a happy number.

It is not a de Polignac number, because 161216363 - 2² = 161216359 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (161216369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201881 + ... + 202677.

It is an arithmetic number, because the mean of its divisors is an integer number (6549984).

Almost surely, 2^161216363 is an apocalyptic number.

161216363 is a deficient number, since it is larger than the sum of its proper divisors (48383125).

161216363 is a wasteful number, since it uses less digits than its factorization.

161216363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923.

The product of its digits is 3888, while the sum is 29.

The square root of 161216363 is about 12697.1005745406. The cubic root of 161216363 is about 544.2557672638.

The spelling of 161216363 in words is "one hundred sixty-one million, two hundred sixteen thousand, three hundred sixty-three".