55785676872 has 32 divisors (see below), whose sum is σ = 139497501600. Its totient is φ = 18590784384.

The previous prime is 55785676861. The next prime is 55785676879. The reversal of 55785676872 is 27867658755.

It is a super-2 number, since 2×55785676872² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55785676879) 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, 174213 + ... + 376724.

It is an arithmetic number, because the mean of its divisors is an integer number (4359296925).

Almost surely, 2^55785676872 is an apocalyptic number.

It is an amenable number.

55785676872 is an abundant number, since it is smaller than the sum of its proper divisors (83711824728).

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

55785676872 is a wasteful number, since it uses less digits than its factorization.

55785676872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555165 (or 555161 counting only the distinct ones).

The product of its digits is 197568000, while the sum is 66.

The spelling of 55785676872 in words is "fifty-five billion, seven hundred eighty-five million, six hundred seventy-six thousand, eight hundred seventy-two".