551817044268 has 36 divisors (see below), whose sum is σ = 1497789121752. Its totient is φ = 157662012480.

The previous prime is 551817044263. The next prime is 551817044291. The reversal of 551817044268 is 862440718155.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 551817044268.

It is not an unprimeable number, because it can be changed into a prime (551817044263) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 469231593 + ... + 469232768.

It is an arithmetic number, because the mean of its divisors is an integer number (41605253382).

Almost surely, 2^551817044268 is an apocalyptic number.

It is an amenable number.

551817044268 is an abundant number, since it is smaller than the sum of its proper divisors (945972077484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551817044268 is a wasteful number, since it uses less digits than its factorization.

551817044268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938464382 (or 938464373 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 551817044268 in words is "five hundred fifty-one billion, eight hundred seventeen million, forty-four thousand, two hundred sixty-eight".