551085997309 has 8 divisors (see below), whose sum is σ = 552069543168. Its totient is φ = 550103246880.

The previous prime is 551085997283. The next prime is 551085997321. The reversal of 551085997309 is 903799580155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 551085997309 - 2¹¹ = 551085995261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551085997339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1196724 + ... + 1591954.

It is an arithmetic number, because the mean of its divisors is an integer number (69008692896).

Almost surely, 2^551085997309 is an apocalyptic number.

It is an amenable number.

551085997309 is a deficient number, since it is larger than the sum of its proper divisors (983545859).

551085997309 is a wasteful number, since it uses less digits than its factorization.

551085997309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397715.

The product of its (nonzero) digits is 15309000, while the sum is 61.

The spelling of 551085997309 in words is "five hundred fifty-one billion, eighty-five million, nine hundred ninety-seven thousand, three hundred nine".