161610738 has 32 divisors (see below), whose sum is σ = 343082304. Its totient is φ = 50575872.

The previous prime is 161610731. The next prime is 161610749. The reversal of 161610738 is 837016161.

It is a super-2 number, since 2×161610738² = 52236061273809288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161610699 and 161610708.

It is not an unprimeable number, because it can be changed into a prime (161610731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44881 + ... + 48347.

It is an arithmetic number, because the mean of its divisors is an integer number (10721322).

Almost surely, 2^161610738 is an apocalyptic number.

161610738 is an abundant number, since it is smaller than the sum of its proper divisors (181471566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161610738 is a wasteful number, since it uses less digits than its factorization.

161610738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3946.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 161610738 is about 12712.6212088617. The cubic root of 161610738 is about 544.6992005071.

Adding to 161610738 its reverse (837016161), we get a palindrome (998626899).

The spelling of 161610738 in words is "one hundred sixty-one million, six hundred ten thousand, seven hundred thirty-eight".