551561016225 has 12 divisors (see below), whose sum is σ = 911914213616. Its totient is φ = 294165875280.

The previous prime is 551561016199. The next prime is 551561016239. The reversal of 551561016225 is 522610165155.

It is not a de Polignac number, because 551561016225 - 2²⁶ = 551493907361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3677073367 + ... + 3677073516.

Almost surely, 2^551561016225 is an apocalyptic number.

It is an amenable number.

551561016225 is a deficient number, since it is larger than the sum of its proper divisors (360353197391).

551561016225 is a wasteful number, since it uses less digits than its factorization.

551561016225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7354146896 (or 7354146891 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 39.

The spelling of 551561016225 in words is "five hundred fifty-one billion, five hundred sixty-one million, sixteen thousand, two hundred twenty-five".