25154779201 has 2 divisors, whose sum is σ = 25154779202. Its totient is φ = 25154779200.

The previous prime is 25154779187. The next prime is 25154779211. The reversal of 25154779201 is 10297745152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17827590400 + 7327188801 = 133520^2 + 85599^2 .

It is a cyclic number.

It is not a de Polignac number, because 25154779201 - 2⁹ = 25154778689 is a prime.

It is not a weakly prime, because it can be changed into another prime (25154779211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12577389600 + 12577389601.

It is an arithmetic number, because the mean of its divisors is an integer number (12577389601).

Almost surely, 2^25154779201 is an apocalyptic number.

It is an amenable number.

25154779201 is a deficient number, since it is larger than the sum of its proper divisors (1).

25154779201 is an equidigital number, since it uses as much as digits as its factorization.

25154779201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 176400, while the sum is 43.

The spelling of 25154779201 in words is "twenty-five billion, one hundred fifty-four million, seven hundred seventy-nine thousand, two hundred one".