551278817016 has 128 divisors (see below), whose sum is σ = 1411432281600. Its totient is φ = 179377390080.

The previous prime is 551278817003. The next prime is 551278817021. The reversal of 551278817016 is 610718872155.

It is a happy number.

It is a super-2 number, since 2×551278817016² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551278817016.

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 in 31 ways as a sum of consecutive naturals, for example, 230755950 + ... + 230758338.

It is an arithmetic number, because the mean of its divisors is an integer number (11026814700).

Almost surely, 2^551278817016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551278817016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705716140800).

551278817016 is an abundant number, since it is smaller than the sum of its proper divisors (860153464584).

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

551278817016 is a wasteful number, since it uses less digits than its factorization.

551278817016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589 (or 3585 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 51.

The spelling of 551278817016 in words is "five hundred fifty-one billion, two hundred seventy-eight million, eight hundred seventeen thousand, sixteen".