25650161 has 4 divisors (see below), whose sum is σ = 27159012. Its totient is φ = 24141312.

The previous prime is 25650151. The next prime is 25650167. The reversal of 25650161 is 16105652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21160000 + 4490161 = 4600^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 25650161 - 2²² = 21455857 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25650161.

It is not an unprimeable number, because it can be changed into a prime (25650167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754400 + ... + 754433.

It is an arithmetic number, because the mean of its divisors is an integer number (6789753).

Almost surely, 2^25650161 is an apocalyptic number.

It is an amenable number.

25650161 is a deficient number, since it is larger than the sum of its proper divisors (1508851).

25650161 is a wasteful number, since it uses less digits than its factorization.

25650161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508850.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 25650161 is about 5064.5987995102. The cubic root of 25650161 is about 294.9148887858.

The spelling of 25650161 in words is "twenty-five million, six hundred fifty thousand, one hundred sixty-one".