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52181368789 = 1119249671621
BaseRepresentation
bin110000100110010000…
…000111111111010101
311222200121110012001111
4300212100013333111
51323331412300124
635545523455021
73525050213344
oct604620077725
9158617405044
1052181368789
1120148027780
12a143527471
134bc7979ca4
14275031bb5b
151556131494
hexc26407fd5

52181368789 has 8 divisors (see below), whose sum is σ = 59921189280. Its totient is φ = 44940891600.

The previous prime is 52181368741. The next prime is 52181368807. The reversal of 52181368789 is 98786318125.

52181368789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52181368789 - 29 = 52181368277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52181366789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124835602 + ... + 124836019.

It is an arithmetic number, because the mean of its divisors is an integer number (7490148660).

Almost surely, 252181368789 is an apocalyptic number.

It is an amenable number.

52181368789 is a deficient number, since it is larger than the sum of its proper divisors (7739820491).

52181368789 is a wasteful number, since it uses less digits than its factorization.

52181368789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249671651.

The product of its digits is 5806080, while the sum is 58.

The spelling of 52181368789 in words is "fifty-two billion, one hundred eighty-one million, three hundred sixty-eight thousand, seven hundred eighty-nine".

Divisors: 1 11 19 209 249671621 2746387831 4743760799 52181368789