25605001132321 has 32 divisors (see below), whose sum is σ = 28096517433600. Its totient is φ = 23192371319040.

The previous prime is 25605001132313. The next prime is 25605001132327. The reversal of 25605001132321 is 12323110050652.

It is a cyclic number.

It is not a de Polignac number, because 25605001132321 - 2³ = 25605001132313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25605001132327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 513811876 + ... + 513861706.

It is an arithmetic number, because the mean of its divisors is an integer number (878016169800).

Almost surely, 2^{25605001132321} is an apocalyptic number.

It is an amenable number.

25605001132321 is a deficient number, since it is larger than the sum of its proper divisors (2491516301279).

25605001132321 is a wasteful number, since it uses less digits than its factorization.

25605001132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53449.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 25605001132321 its reverse (12323110050652), we get a palindrome (37928111182973).

The spelling of 25605001132321 in words is "twenty-five trillion, six hundred five billion, one million, one hundred thirty-two thousand, three hundred twenty-one".