10212809856 has 64 divisors (see below), whose sum is σ = 27860998080. Its totient is φ = 3312258048.

The previous prime is 10212809851. The next prime is 10212809861. The reversal of 10212809856 is 65890821201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (10212809851) and next prime (10212809861).

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (10212809851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345196 + ... + 373611.

It is an arithmetic number, because the mean of its divisors is an integer number (435328095).

Almost surely, 2^10212809856 is an apocalyptic number.

10212809856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10212809856 is an abundant number, since it is smaller than the sum of its proper divisors (17648188224).

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

10212809856 is an equidigital number, since it uses as much as digits as its factorization.

10212809856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718861 (or 718849 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 10212809856 in words is "ten billion, two hundred twelve million, eight hundred nine thousand, eight hundred fifty-six".