25321605526551 has 16 divisors (see below), whose sum is σ = 33903854402400. Its totient is φ = 16810284828288.

The previous prime is 25321605526507. The next prime is 25321605526561. The reversal of 25321605526551 is 15562550612352.

It is not a de Polignac number, because 25321605526551 - 2¹⁸ = 25321605264407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25321605526551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25321605526501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7494756 + ... + 10335113.

It is an arithmetic number, because the mean of its divisors is an integer number (2118990900150).

Almost surely, 2^{25321605526551} is an apocalyptic number.

25321605526551 is a deficient number, since it is larger than the sum of its proper divisors (8582248875849).

25321605526551 is a wasteful number, since it uses less digits than its factorization.

25321605526551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17831858.

The product of its (nonzero) digits is 2700000, while the sum is 48.

The spelling of 25321605526551 in words is "twenty-five trillion, three hundred twenty-one billion, six hundred five million, five hundred twenty-six thousand, five hundred fifty-one".