25440710401 has 2 divisors, whose sum is σ = 25440710402. Its totient is φ = 25440710400.

The previous prime is 25440710377. The next prime is 25440710413. The reversal of 25440710401 is 10401704452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23782266225 + 1658444176 = 154215^2 + 40724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25440710401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25440710401.

It is not a weakly prime, because it can be changed into another prime (25440710441) 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 as a sum of consecutive naturals, namely, 12720355200 + 12720355201.

It is an arithmetic number, because the mean of its divisors is an integer number (12720355201).

Almost surely, 2^25440710401 is an apocalyptic number.

It is an amenable number.

25440710401 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440710401 is an equidigital number, since it uses as much as digits as its factorization.

25440710401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 28.

The spelling of 25440710401 in words is "twenty-five billion, four hundred forty million, seven hundred ten thousand, four hundred one".