161844137 has 16 divisors (see below), whose sum is σ = 200968320. Its totient is φ = 126911232.

The previous prime is 161844127. The next prime is 161844229. The reversal of 161844137 is 731448161.

It is a happy number.

161844137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161844137 - 2⁴ = 161844121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161844097 and 161844106.

It is not an unprimeable number, because it can be changed into a prime (161844127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2414 + ... + 18152.

It is an arithmetic number, because the mean of its divisors is an integer number (12560520).

Almost surely, 2^161844137 is an apocalyptic number.

It is an amenable number.

161844137 is a deficient number, since it is larger than the sum of its proper divisors (39124183).

161844137 is a wasteful number, since it uses less digits than its factorization.

161844137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15872.

The product of its digits is 16128, while the sum is 35.

The square root of 161844137 is about 12721.7977110155. The cubic root of 161844137 is about 544.9612934383.

The spelling of 161844137 in words is "one hundred sixty-one million, eight hundred forty-four thousand, one hundred thirty-seven".