551391396852 has 24 divisors (see below), whose sum is σ = 1304700772032. Its totient is φ = 181208440000.

The previous prime is 551391396851. The next prime is 551391396883. The reversal of 551391396852 is 258693193155.

It is a junction number, because it is equal to n+sod(n) for n = 551391396792 and 551391396801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551391396851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 323585649 + ... + 323587352.

It is an arithmetic number, because the mean of its divisors is an integer number (54362532168).

Almost surely, 2^551391396852 is an apocalyptic number.

It is an amenable number.

551391396852 is an abundant number, since it is smaller than the sum of its proper divisors (753309375180).

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

551391396852 is a wasteful number, since it uses less digits than its factorization.

551391396852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647173079 (or 647173077 counting only the distinct ones).

The product of its digits is 8748000, while the sum is 57.

The spelling of 551391396852 in words is "five hundred fifty-one billion, three hundred ninety-one million, three hundred ninety-six thousand, eight hundred fifty-two".