161500407 has 8 divisors (see below), whose sum is σ = 215402880. Its totient is φ = 107632440.

The previous prime is 161500397. The next prime is 161500453. The reversal of 161500407 is 704005161.

161500407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161500407 - 2⁸ = 161500151 is a prime.

It is a super-2 number, since 2×161500407² = 52164762922331298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161500307) 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, 5694 + ... + 18852.

It is an arithmetic number, because the mean of its divisors is an integer number (26925360).

Almost surely, 2^161500407 is an apocalyptic number.

161500407 is a deficient number, since it is larger than the sum of its proper divisors (53902473).

161500407 is a wasteful number, since it uses less digits than its factorization.

161500407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17253.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 161500407 is about 12708.2810403296. The cubic root of 161500407 is about 544.5752176384.

Adding to 161500407 its reverse (704005161), we get a palindrome (865505568).

The spelling of 161500407 in words is "one hundred sixty-one million, five hundred thousand, four hundred seven".