161825069 has 8 divisors (see below), whose sum is σ = 185536320. Its totient is φ = 138262176.

The previous prime is 161825029. The next prime is 161825077. The reversal of 161825069 is 960528161.

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 161825069 - 2⁸ = 161824813 is a prime.

It is a super-2 number, since 2×161825069² = 52374705913709522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161825029) 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, 34739 + ... + 39120.

It is an arithmetic number, because the mean of its divisors is an integer number (23192040).

Almost surely, 2^161825069 is an apocalyptic number.

It is an amenable number.

161825069 is a deficient number, since it is larger than the sum of its proper divisors (23711251).

161825069 is an equidigital number, since it uses as much as digits as its factorization.

161825069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74179.

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 161825069 is about 12721.0482665541. The cubic root of 161825069 is about 544.9398906857.

The spelling of 161825069 in words is "one hundred sixty-one million, eight hundred twenty-five thousand, sixty-nine".