161892725 has 12 divisors (see below), whose sum is σ = 203290560. Its totient is φ = 127873200.

The previous prime is 161892713. The next prime is 161892737. The reversal of 161892725 is 527298161.

161892725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161892713) and next prime (161892737).

It is not a de Polignac number, because 161892725 - 2¹⁰ = 161891701 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39011 + ... + 42960.

It is an arithmetic number, because the mean of its divisors is an integer number (16940880).

Almost surely, 2^161892725 is an apocalyptic number.

It is an amenable number.

161892725 is a deficient number, since it is larger than the sum of its proper divisors (41397835).

161892725 is an equidigital number, since it uses as much as digits as its factorization.

161892725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82060 (or 82055 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 161892725 is about 12723.7072034844. The cubic root of 161892725 is about 545.0158231245.

The spelling of 161892725 in words is "one hundred sixty-one million, eight hundred ninety-two thousand, seven hundred twenty-five".