10161665725 has 6 divisors (see below), whose sum is σ = 12600465530. Its totient is φ = 8129332560.

The previous prime is 10161665713. The next prime is 10161665737. The reversal of 10161665725 is 52756616101.

It is an interprime number because it is at equal distance from previous prime (10161665713) and next prime (10161665737).

It can be written as a sum of positive squares in 3 ways, for example, as 622521 + 10161043204 = 789^2 + 100802^2 .

It is not a de Polignac number, because 10161665725 - 2⁵ = 10161665693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 203233290 + ... + 203233339.

Almost surely, 2^10161665725 is an apocalyptic number.

It is an amenable number.

10161665725 is a deficient number, since it is larger than the sum of its proper divisors (2438799805).

10161665725 is an equidigital number, since it uses as much as digits as its factorization.

10161665725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406466639 (or 406466634 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 10161665725 in words is "ten billion, one hundred sixty-one million, six hundred sixty-five thousand, seven hundred twenty-five".