161445407 has 8 divisors (see below), whose sum is σ = 167441040. Its totient is φ = 155478400.

The previous prime is 161445397. The next prime is 161445419. The reversal of 161445407 is 704544161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161445407 - 2⁴ = 161445391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161445437) 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, 4688 + ... + 18570.

It is an arithmetic number, because the mean of its divisors is an integer number (20930130).

Almost surely, 2^161445407 is an apocalyptic number.

161445407 is a deficient number, since it is larger than the sum of its proper divisors (5995633).

161445407 is a wasteful number, since it uses less digits than its factorization.

161445407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14313.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 161445407 is about 12706.1169127314. The cubic root of 161445407 is about 544.5133910911.

Adding to 161445407 its reverse (704544161), we get a palindrome (865989568).

The spelling of 161445407 in words is "one hundred sixty-one million, four hundred forty-five thousand, four hundred seven".