25554245401 has 2 divisors, whose sum is σ = 25554245402. Its totient is φ = 25554245400.

The previous prime is 25554245393. The next prime is 25554245429. The reversal of 25554245401 is 10454245552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20449000000 + 5105245401 = 143000^2 + 71451^2 .

It is a cyclic number.

It is not a de Polignac number, because 25554245401 - 2³ = 25554245393 is a prime.

It is not a weakly prime, because it can be changed into another prime (25554245441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12777122700 + 12777122701.

It is an arithmetic number, because the mean of its divisors is an integer number (12777122701).

Almost surely, 2^25554245401 is an apocalyptic number.

It is an amenable number.

25554245401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25554245401 is an equidigital number, since it uses as much as digits as its factorization.

25554245401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160000, while the sum is 37.

The spelling of 25554245401 in words is "twenty-five billion, five hundred fifty-four million, two hundred forty-five thousand, four hundred one".