25502225522551 has 4 divisors (see below), whose sum is σ = 26044826065632. Its totient is φ = 24959624979472.

The previous prime is 25502225522549. The next prime is 25502225522563. The reversal of 25502225522551 is 15522552220552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25502225522551 - 2¹ = 25502225522549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25502225522498 and 25502225522507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25502225525551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271300271470 + ... + 271300271563.

It is an arithmetic number, because the mean of its divisors is an integer number (6511206516408).

Almost surely, 2^{25502225522551} is an apocalyptic number.

25502225522551 is a deficient number, since it is larger than the sum of its proper divisors (542600543081).

25502225522551 is an equidigital number, since it uses as much as digits as its factorization.

25502225522551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542600543080.

The product of its (nonzero) digits is 1000000, while the sum is 43.

The spelling of 25502225522551 in words is "twenty-five trillion, five hundred two billion, two hundred twenty-five million, five hundred twenty-two thousand, five hundred fifty-one".