10646221663 has 48 divisors (see below), whose sum is σ = 13826288448. Its totient is φ = 8018841600.

The previous prime is 10646221643. The next prime is 10646221667. The reversal of 10646221663 is 36612264601.

It is not a de Polignac number, because 10646221663 - 2²¹ = 10644124511 is a prime.

It is a super-2 number, since 2×10646221663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10646221667) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3922795 + ... + 3925507.

It is an arithmetic number, because the mean of its divisors is an integer number (288047676).

Almost surely, 2^10646221663 is an apocalyptic number.

10646221663 is a deficient number, since it is larger than the sum of its proper divisors (3180066785).

10646221663 is a wasteful number, since it uses less digits than its factorization.

10646221663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2896 (or 2885 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 10646221663 in words is "ten billion, six hundred forty-six million, two hundred twenty-one thousand, six hundred sixty-three".