25458141721 has 4 divisors (see below), whose sum is σ = 26565017472. Its totient is φ = 24351265972.

The previous prime is 25458141719. The next prime is 25458141727. The reversal of 25458141721 is 12714185452.

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 25458141721 - 2¹ = 25458141719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25458141727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553437841 + ... + 553437886.

It is an arithmetic number, because the mean of its divisors is an integer number (6641254368).

Almost surely, 2^25458141721 is an apocalyptic number.

It is an amenable number.

25458141721 is a deficient number, since it is larger than the sum of its proper divisors (1106875751).

25458141721 is a wasteful number, since it uses less digits than its factorization.

25458141721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106875750.

The product of its digits is 89600, while the sum is 40.

The spelling of 25458141721 in words is "twenty-five billion, four hundred fifty-eight million, one hundred forty-one thousand, seven hundred twenty-one".