551421333040520 has 16 divisors (see below), whose sum is σ = 1240697999341260. Its totient is φ = 220568533216192.

The previous prime is 551421333040489. The next prime is 551421333040541. The reversal of 551421333040520 is 25040333124155.

It can be written as a sum of positive squares in 2 ways, for example, as 544283020855876 + 7138312184644 = 23329874^2 + 2671762^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6892766662967 + ... + 6892766663046.

Almost surely, 2^{551421333040520} is an apocalyptic number.

It is an amenable number.

551421333040520 is an abundant number, since it is smaller than the sum of its proper divisors (689276666300740).

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

551421333040520 is a wasteful number, since it uses less digits than its factorization.

551421333040520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13785533326024 (or 13785533326020 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 38.

Adding to 551421333040520 its reverse (25040333124155), we get a palindrome (576461666164675).

The spelling of 551421333040520 in words is "five hundred fifty-one trillion, four hundred twenty-one billion, three hundred thirty-three million, forty thousand, five hundred twenty".