161234665 has 16 divisors (see below), whose sum is σ = 204235200. Its totient is φ = 121856832.

The previous prime is 161234663. The next prime is 161234699. The reversal of 161234665 is 566432161.

It is a cyclic number.

It is not a de Polignac number, because 161234665 - 2¹ = 161234663 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161234665.

It is not an unprimeable number, because it can be changed into a prime (161234663) 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, 34774 + ... + 39136.

It is an arithmetic number, because the mean of its divisors is an integer number (12764700).

Almost surely, 2^161234665 is an apocalyptic number.

It is an amenable number.

161234665 is a deficient number, since it is larger than the sum of its proper divisors (43000535).

161234665 is a wasteful number, since it uses less digits than its factorization.

161234665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776.

The product of its digits is 25920, while the sum is 34.

The square root of 161234665 is about 12697.8212698085. The cubic root of 161234665 is about 544.2763619312.

The spelling of 161234665 in words is "one hundred sixty-one million, two hundred thirty-four thousand, six hundred sixty-five".