25664521342 has 16 divisors (see below), whose sum is σ = 42533530272. Its totient is φ = 11552316160.

The previous prime is 25664521331. The next prime is 25664521357. The reversal of 25664521342 is 24312546652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25664521295 and 25664521304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16408759 + ... + 16410322.

It is an arithmetic number, because the mean of its divisors is an integer number (2658345642).

Almost surely, 2^25664521342 is an apocalyptic number.

25664521342 is a deficient number, since it is larger than the sum of its proper divisors (16869008930).

25664521342 is a wasteful number, since it uses less digits than its factorization.

25664521342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32819123.

The product of its digits is 345600, while the sum is 40.

The spelling of 25664521342 in words is "twenty-five billion, six hundred sixty-four million, five hundred twenty-one thousand, three hundred forty-two".