551244881772 has 72 divisors (see below), whose sum is σ = 1588882329216. Its totient is φ = 159636524544.

The previous prime is 551244881741. The next prime is 551244881809. The reversal of 551244881772 is 277188442155.

551244881772 is a `hidden beast` number, since 5 + 51 + 2 + 448 + 81 + 7 + 72 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34635388 + ... + 34651299.

It is an arithmetic number, because the mean of its divisors is an integer number (22067810128).

Almost surely, 2^551244881772 is an apocalyptic number.

551244881772 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

551244881772 is an abundant number, since it is smaller than the sum of its proper divisors (1037637447444).

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

551244881772 is a wasteful number, since it uses less digits than its factorization.

551244881772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69286727 (or 69286722 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 54.

The spelling of 551244881772 in words is "five hundred fifty-one billion, two hundred forty-four million, eight hundred eighty-one thousand, seven hundred seventy-two".