25421460109 has 2 divisors, whose sum is σ = 25421460110. Its totient is φ = 25421460108.

The previous prime is 25421460091. The next prime is 25421460137. The reversal of 25421460109 is 90106412452.

Together with previous prime (25421460091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22120612900 + 3300847209 = 148730^2 + 57453^2 .

It is a cyclic number.

It is not a de Polignac number, because 25421460109 - 2⁷ = 25421459981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25421460139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12710730054 + 12710730055.

It is an arithmetic number, because the mean of its divisors is an integer number (12710730055).

Almost surely, 2^25421460109 is an apocalyptic number.

It is an amenable number.

25421460109 is a deficient number, since it is larger than the sum of its proper divisors (1).

25421460109 is an equidigital number, since it uses as much as digits as its factorization.

25421460109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 25421460109 in words is "twenty-five billion, four hundred twenty-one million, four hundred sixty thousand, one hundred nine".