25440612763 has 2 divisors, whose sum is σ = 25440612764. Its totient is φ = 25440612762.

The previous prime is 25440612721. The next prime is 25440612811. The reversal of 25440612763 is 36721604452.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25440612763 is a prime.

It is not a weakly prime, because it can be changed into another prime (25440612713) 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, 12720306381 + 12720306382.

It is an arithmetic number, because the mean of its divisors is an integer number (12720306382).

Almost surely, 2^25440612763 is an apocalyptic number.

25440612763 is a deficient number, since it is larger than the sum of its proper divisors (1).

25440612763 is an equidigital number, since it uses as much as digits as its factorization.

25440612763 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 40.

The spelling of 25440612763 in words is "twenty-five billion, four hundred forty million, six hundred twelve thousand, seven hundred sixty-three".