10650439821 has 16 divisors (see below), whose sum is σ = 16606667264. Its totient is φ = 5944431024.

The previous prime is 10650439819. The next prime is 10650439843. The reversal of 10650439821 is 12893405601.

It is not a de Polignac number, because 10650439821 - 2¹ = 10650439819 is a prime.

It is a super-4 number, since 4×10650439821⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10650439821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10650439621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5896351 + ... + 5898156.

It is an arithmetic number, because the mean of its divisors is an integer number (1037916704).

Almost surely, 2^10650439821 is an apocalyptic number.

It is an amenable number.

10650439821 is a deficient number, since it is larger than the sum of its proper divisors (5956227443).

10650439821 is a wasteful number, since it uses less digits than its factorization.

10650439821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11794560.

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 10650439821 in words is "ten billion, six hundred fifty million, four hundred thirty-nine thousand, eight hundred twenty-one".