25273765457 has 2 divisors, whose sum is σ = 25273765458. Its totient is φ = 25273765456.

The previous prime is 25273765453. The next prime is 25273765519. The reversal of 25273765457 is 75456737252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13857056656 + 11416708801 = 117716^2 + 106849^2 .

It is a cyclic number.

It is not a de Polignac number, because 25273765457 - 2² = 25273765453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25273765399 and 25273765408.

It is not a weakly prime, because it can be changed into another prime (25273765453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12636882728 + 12636882729.

It is an arithmetic number, because the mean of its divisors is an integer number (12636882729).

Almost surely, 2^25273765457 is an apocalyptic number.

It is an amenable number.

25273765457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25273765457 is an equidigital number, since it uses as much as digits as its factorization.

25273765457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12348000, while the sum is 53.

The spelling of 25273765457 in words is "twenty-five billion, two hundred seventy-three million, seven hundred sixty-five thousand, four hundred fifty-seven".