25253696161 has 8 divisors (see below), whose sum is σ = 26232921000. Its totient is φ = 24281698560.

The previous prime is 25253696107. The next prime is 25253696257. The reversal of 25253696161 is 16169635252.

It can be written as a sum of positive squares in 4 ways, for example, as 8384881761 + 16868814400 = 91569^2 + 129880^2 .

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 25253696161 - 2⁷ = 25253696033 is a prime.

It is a super-2 number, since 2×25253696161² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25253696861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1799686 + ... + 1813663.

It is an arithmetic number, because the mean of its divisors is an integer number (3279115125).

Almost surely, 2^25253696161 is an apocalyptic number.

It is an amenable number.

25253696161 is a deficient number, since it is larger than the sum of its proper divisors (979224839).

25253696161 is a wasteful number, since it uses less digits than its factorization.

25253696161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3613619.

The product of its digits is 583200, while the sum is 46.

The spelling of 25253696161 in words is "twenty-five billion, two hundred fifty-three million, six hundred ninety-six thousand, one hundred sixty-one".