551711161020 has 48 divisors (see below), whose sum is σ = 1586542372128. Its totient is φ = 143146679040.

The previous prime is 551711160989. The next prime is 551711161061. The reversal of 551711161020 is 20161117155.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 124257051 + ... + 124261490.

It is an arithmetic number, because the mean of its divisors is an integer number (33052966086).

Almost surely, 2^551711161020 is an apocalyptic number.

It is an amenable number.

551711161020 is an abundant number, since it is smaller than the sum of its proper divisors (1034831211108).

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

551711161020 is a wasteful number, since it uses less digits than its factorization.

551711161020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248518590 (or 248518588 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 30.

Adding to 551711161020 its reverse (20161117155), we get a palindrome (571872278175).

The spelling of 551711161020 in words is "five hundred fifty-one billion, seven hundred eleven million, one hundred sixty-one thousand, twenty".