52787721555 has 48 divisors (see below), whose sum is σ = 94009275360. Its totient is φ = 27390818304.

The previous prime is 52787721551. The next prime is 52787721589. The reversal of 52787721555 is 55512778725.

It is a happy number.

52787721555 is a `hidden beast` number, since 5 + 2 + 7 + 87 + 7 + 2 + 1 + 555 = 666.

It is not a de Polignac number, because 52787721555 - 2² = 52787721551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52787721551) 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 47 ways as a sum of consecutive naturals, for example, 155049 + ... + 360021.

It is an arithmetic number, because the mean of its divisors is an integer number (1958526570).

Almost surely, 2^52787721555 is an apocalyptic number.

52787721555 is a deficient number, since it is larger than the sum of its proper divisors (41221553805).

52787721555 is a wasteful number, since it uses less digits than its factorization.

52787721555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205140 (or 205137 counting only the distinct ones).

The product of its digits is 6860000, while the sum is 54.

The spelling of 52787721555 in words is "fifty-two billion, seven hundred eighty-seven million, seven hundred twenty-one thousand, five hundred fifty-five".