25255021489 has 2 divisors, whose sum is σ = 25255021490. Its totient is φ = 25255021488.

The previous prime is 25255021457. The next prime is 25255021507. The reversal of 25255021489 is 98412055252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20903376400 + 4351645089 = 144580^2 + 65967^2 .

It is a cyclic number.

It is not a de Polignac number, because 25255021489 - 2⁵ = 25255021457 is a prime.

It is a super-2 number, since 2×25255021489² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25255021409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12627510744 + 12627510745.

It is an arithmetic number, because the mean of its divisors is an integer number (12627510745).

Almost surely, 2^25255021489 is an apocalyptic number.

It is an amenable number.

25255021489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25255021489 is an equidigital number, since it uses as much as digits as its factorization.

25255021489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 25255021489 in words is "twenty-five billion, two hundred fifty-five million, twenty-one thousand, four hundred eighty-nine".