25440538363 has 2 divisors, whose sum is σ = 25440538364. Its totient is φ = 25440538362.

The previous prime is 25440538307. The next prime is 25440538379. The reversal of 25440538363 is 36383504452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25440538363 is a prime.

It is not a weakly prime, because it can be changed into another prime (25440538393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12720269181 + 12720269182.

It is an arithmetic number, because the mean of its divisors is an integer number (12720269182).

Almost surely, 2^25440538363 is an apocalyptic number.

25440538363 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440538363 is an equidigital number, since it uses as much as digits as its factorization.

25440538363 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 43.

The spelling of 25440538363 in words is "twenty-five billion, four hundred forty million, five hundred thirty-eight thousand, three hundred sixty-three".