161816614 has 16 divisors (see below), whose sum is σ = 249681888. Its totient is φ = 78596352.

The previous prime is 161816593. The next prime is 161816617. The reversal of 161816614 is 416618161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161816614.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161816617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59574 + ... + 62230.

It is an arithmetic number, because the mean of its divisors is an integer number (15605118).

Almost surely, 2^161816614 is an apocalyptic number.

161816614 is a deficient number, since it is larger than the sum of its proper divisors (87865274).

161816614 is a wasteful number, since it uses less digits than its factorization.

161816614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519.

The product of its digits is 6912, while the sum is 34.

The square root of 161816614 is about 12720.7159389714. The cubic root of 161816614 is about 544.9303998879.

The spelling of 161816614 in words is "one hundred sixty-one million, eight hundred sixteen thousand, six hundred fourteen".