25504488769 has 2 divisors, whose sum is σ = 25504488770. Its totient is φ = 25504488768.

The previous prime is 25504488767. The next prime is 25504488787. The reversal of 25504488769 is 96788440552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24692979600 + 811509169 = 157140^2 + 28487^2 .

It is a cyclic number.

It is not a de Polignac number, because 25504488769 - 2¹ = 25504488767 is a prime.

It is a super-2 number, since 2×25504488769² (a number of 22 digits) contains 22 as substring.

Together with 25504488767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25504488767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12752244384 + 12752244385.

It is an arithmetic number, because the mean of its divisors is an integer number (12752244385).

Almost surely, 2^25504488769 is an apocalyptic number.

It is an amenable number.

25504488769 is a deficient number, since it is larger than the sum of its proper divisors (1).

25504488769 is an equidigital number, since it uses as much as digits as its factorization.

25504488769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 25504488769 in words is "twenty-five billion, five hundred four million, four hundred eighty-eight thousand, seven hundred sixty-nine".