25421461109 has 4 divisors (see below), whose sum is σ = 27732503040. Its totient is φ = 23110419180.

The previous prime is 25421461057. The next prime is 25421461127. The reversal of 25421461109 is 90116412452.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25421461109 - 2²⁰ = 25420412533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25421460109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155520949 + ... + 1155520970.

It is an arithmetic number, because the mean of its divisors is an integer number (6933125760).

Almost surely, 2^25421461109 is an apocalyptic number.

It is an amenable number.

25421461109 is a deficient number, since it is larger than the sum of its proper divisors (2311041931).

25421461109 is a wasteful number, since it uses less digits than its factorization.

25421461109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311041930.

The product of its (nonzero) digits is 17280, while the sum is 35.

The spelling of 25421461109 in words is "twenty-five billion, four hundred twenty-one million, four hundred sixty-one thousand, one hundred nine".