551345721825 has 24 divisors (see below), whose sum is σ = 936194974528. Its totient is φ = 286103724480.

The previous prime is 551345721769. The next prime is 551345721907. The reversal of 551345721825 is 528127543155.

It is not a de Polignac number, because 551345721825 - 2⁸ = 551345721569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 99338797 + ... + 99344346.

Almost surely, 2^551345721825 is an apocalyptic number.

It is an amenable number.

551345721825 is a deficient number, since it is larger than the sum of its proper divisors (384849252703).

551345721825 is a wasteful number, since it uses less digits than its factorization.

551345721825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198683193 (or 198683188 counting only the distinct ones).

The product of its digits is 1680000, while the sum is 48.

The spelling of 551345721825 in words is "five hundred fifty-one billion, three hundred forty-five million, seven hundred twenty-one thousand, eight hundred twenty-five".