55656722212 has 48 divisors (see below), whose sum is σ = 126927561600. Its totient is φ = 20722862592.

The previous prime is 55656722171. The next prime is 55656722227. The reversal of 55656722212 is 21222765655.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4490962 + ... + 4503337.

It is an arithmetic number, because the mean of its divisors is an integer number (2644324200).

Almost surely, 2^55656722212 is an apocalyptic number.

55656722212 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

55656722212 is an abundant number, since it is smaller than the sum of its proper divisors (71270839388).

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

55656722212 is a wasteful number, since it uses less digits than its factorization.

55656722212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8994340 (or 8994338 counting only the distinct ones).

The product of its digits is 504000, while the sum is 43.

The spelling of 55656722212 in words is "fifty-five billion, six hundred fifty-six million, seven hundred twenty-two thousand, two hundred twelve".