25350440321 has 4 divisors (see below), whose sum is σ = 25587360432. Its totient is φ = 25113520212.

The previous prime is 25350440299. The next prime is 25350440333. The reversal of 25350440321 is 12304405352.

It is a happy number.

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 25350440321 - 2⁶ = 25350440257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25350442321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118459895 + ... + 118460108.

It is an arithmetic number, because the mean of its divisors is an integer number (6396840108).

Almost surely, 2^25350440321 is an apocalyptic number.

It is an amenable number.

25350440321 is a deficient number, since it is larger than the sum of its proper divisors (236920111).

25350440321 is a wasteful number, since it uses less digits than its factorization.

25350440321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236920110.

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 25350440321 its reverse (12304405352), we get a palindrome (37654845673).

The spelling of 25350440321 in words is "twenty-five billion, three hundred fifty million, four hundred forty thousand, three hundred twenty-one".