25405321004434 has 72 divisors (see below), whose sum is σ = 45899951546880. Its totient is φ = 10515114020880.

The previous prime is 25405321004431. The next prime is 25405321004473. The reversal of 25405321004434 is 43440012350452.

It is a junction number, because it is equal to n+sod(n) for n = 25405321004393 and 25405321004402.

It is not an unprimeable number, because it can be changed into a prime (25405321004431) 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 35 ways as a sum of consecutive naturals, for example, 45587727 + ... + 46141645.

It is an arithmetic number, because the mean of its divisors is an integer number (637499327040).

Almost surely, 2^{25405321004434} is an apocalyptic number.

25405321004434 is a deficient number, since it is larger than the sum of its proper divisors (20494630542446).

25405321004434 is a wasteful number, since it uses less digits than its factorization.

25405321004434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554484 (or 554446 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 25405321004434 its reverse (43440012350452), we get a palindrome (68845333354886).

The spelling of 25405321004434 in words is "twenty-five trillion, four hundred five billion, three hundred twenty-one million, four thousand, four hundred thirty-four".