10521444656 has 10 divisors (see below), whose sum is σ = 20385299052. Its totient is φ = 5260722320.

The previous prime is 10521444643. The next prime is 10521444677. The reversal of 10521444656 is 65644412501.

It is a happy number.

It is a super-2 number, since 2×10521444656² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328795130 + ... + 328795161.

Almost surely, 2^10521444656 is an apocalyptic number.

10521444656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10521444656 is a deficient number, since it is larger than the sum of its proper divisors (9863854396).

10521444656 is an equidigital number, since it uses as much as digits as its factorization.

10521444656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657590299 (or 657590293 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 10521444656 in words is "ten billion, five hundred twenty-one million, four hundred forty-four thousand, six hundred fifty-six".