25580240281 has 2 divisors, whose sum is σ = 25580240282. Its totient is φ = 25580240280.

The previous prime is 25580240269. The next prime is 25580240291. The reversal of 25580240281 is 18204208552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25275912256 + 304328025 = 158984^2 + 17445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25580240281 is a prime.

It is a super-2 number, since 2×25580240281² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25580240281.

It is not a weakly prime, because it can be changed into another prime (25580240291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12790120140 + 12790120141.

It is an arithmetic number, because the mean of its divisors is an integer number (12790120141).

Almost surely, 2^25580240281 is an apocalyptic number.

It is an amenable number.

25580240281 is a deficient number, since it is larger than the sum of its proper divisors (1).

25580240281 is an equidigital number, since it uses as much as digits as its factorization.

25580240281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51200, while the sum is 37.

The spelling of 25580240281 in words is "twenty-five billion, five hundred eighty million, two hundred forty thousand, two hundred eighty-one".