10663694639 has 4 divisors (see below), whose sum is σ = 11483978856. Its totient is φ = 9843410424.

The previous prime is 10663694621. The next prime is 10663694641. The reversal of 10663694639 is 93649636601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93649636601 = 17 ⋅5508802153.

It is a cyclic number.

It is not a de Polignac number, because 10663694639 - 2⁸ = 10663694383 is a prime.

It is a super-2 number, since 2×10663694639² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10663694659) 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 3 ways as a sum of consecutive naturals, for example, 410142089 + ... + 410142114.

It is an arithmetic number, because the mean of its divisors is an integer number (2870994714).

Almost surely, 2^10663694639 is an apocalyptic number.

10663694639 is a deficient number, since it is larger than the sum of its proper divisors (820284217).

10663694639 is an equidigital number, since it uses as much as digits as its factorization.

10663694639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820284216.

The product of its (nonzero) digits is 3779136, while the sum is 53.

The spelling of 10663694639 in words is "ten billion, six hundred sixty-three million, six hundred ninety-four thousand, six hundred thirty-nine".