161445383 has 4 divisors (see below), whose sum is σ = 176122248. Its totient is φ = 146768520.

The previous prime is 161445373. The next prime is 161445391. The reversal of 161445383 is 383544161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161445383 - 2¹⁶ = 161379847 is a prime.

It is a super-2 number, since 2×161445383² = 52129223384033378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161445343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7338416 + ... + 7338437.

It is an arithmetic number, because the mean of its divisors is an integer number (44030562).

Almost surely, 2^161445383 is an apocalyptic number.

161445383 is a deficient number, since it is larger than the sum of its proper divisors (14676865).

161445383 is a wasteful number, since it uses less digits than its factorization.

161445383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676864.

The product of its digits is 34560, while the sum is 35.

The square root of 161445383 is about 12706.1159683044. The cubic root of 161445383 is about 544.5133641091.

It can be divided in two parts, 161 and 445383, that added together give a palindrome (445544).

The spelling of 161445383 in words is "one hundred sixty-one million, four hundred forty-five thousand, three hundred eighty-three".