25827183121 has 2 divisors, whose sum is σ = 25827183122. Its totient is φ = 25827183120.

The previous prime is 25827183119. The next prime is 25827183131. The reversal of 25827183121 is 12138172852.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20460155521 + 5367027600 = 143039^2 + 73260^2 .

It is a cyclic number.

It is not a de Polignac number, because 25827183121 - 2¹ = 25827183119 is a prime.

Together with 25827183119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25827183131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12913591560 + 12913591561.

It is an arithmetic number, because the mean of its divisors is an integer number (12913591561).

Almost surely, 2^25827183121 is an apocalyptic number.

It is an amenable number.

25827183121 is a deficient number, since it is larger than the sum of its proper divisors (1).

25827183121 is an equidigital number, since it uses as much as digits as its factorization.

25827183121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The spelling of 25827183121 in words is "twenty-five billion, eight hundred twenty-seven million, one hundred eighty-three thousand, one hundred twenty-one".