25551522068 has 6 divisors (see below), whose sum is σ = 44715163626. Its totient is φ = 12775761032.

The previous prime is 25551522047. The next prime is 25551522077. The reversal of 25551522068 is 86022515552.

It can be written as a sum of positive squares in only one way, i.e., 24907783684 + 643738384 = 157822^2 + 25372^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3193940255 + ... + 3193940262.

It is an arithmetic number, because the mean of its divisors is an integer number (7452527271).

Almost surely, 2^25551522068 is an apocalyptic number.

It is an amenable number.

25551522068 is a deficient number, since it is larger than the sum of its proper divisors (19163641558).

25551522068 is a wasteful number, since it uses less digits than its factorization.

25551522068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6387880521 (or 6387880519 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 41.

The spelling of 25551522068 in words is "twenty-five billion, five hundred fifty-one million, five hundred twenty-two thousand, sixty-eight".