656213215532 has 24 divisors (see below), whose sum is σ = 1312662917664.
Its totient is φ = 281183559552.
The previous prime is 656213215529. The next prime is 656213215549. The reversal of 656213215532 is 235512312656.
It is a self number, because there is not a number n which added to its sum of digits gives 656213215532.
It is an unprimeable number.
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, 1953113 + ... + 2264304.
It is an arithmetic number, because the mean of its divisors is an integer number (54694288236).
Almost surely, 2656213215532 is an apocalyptic number.
It is an amenable number.
656213215532 is an abundant number, since it is smaller than the sum of its proper divisors (656449702132).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
656213215532 is a wasteful number, since it uses less digits than its factorization.
656213215532 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4222985 (or 4222983 counting only the distinct ones).
The product of its digits is 324000, while the sum is 41.
The spelling of 656213215532 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred fifteen thousand, five hundred thirty-two".