5186821780 has 48 divisors (see below), whose sum is σ = 13103556480. Its totient is φ = 1684741248.

The previous prime is 5186821777. The next prime is 5186821841. The reversal of 5186821780 is 871286815.

It is a self number, because there is not a number n which added to its sum of digits gives 5186821780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 972307 + ... + 977626.

It is an arithmetic number, because the mean of its divisors is an integer number (272990760).

Almost surely, 2^5186821780 is an apocalyptic number.

It is an amenable number.

5186821780 is an abundant number, since it is smaller than the sum of its proper divisors (7916734700).

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

5186821780 is a wasteful number, since it uses less digits than its factorization.

5186821780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949968 (or 1949966 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 46.

The square root of 5186821780 is about 72019.5930285641. The cubic root of 5186821780 is about 1731.0134483196.

The spelling of 5186821780 in words is "five billion, one hundred eighty-six million, eight hundred twenty-one thousand, seven hundred eighty".