10639426649 has 8 divisors (see below), whose sum is σ = 11008695360. Its totient is φ = 10270317456.

The previous prime is 10639426573. The next prime is 10639426697. The reversal of 10639426649 is 94662493601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10639426649 is a prime.

It is a super-2 number, since 2×10639426649² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10639426597 and 10639426606.

It is not an unprimeable number, because it can be changed into a prime (10639422649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104774 + ... + 179600.

It is an arithmetic number, because the mean of its divisors is an integer number (1376086920).

Almost surely, 2^10639426649 is an apocalyptic number.

It is an amenable number.

10639426649 is a deficient number, since it is larger than the sum of its proper divisors (369268711).

10639426649 is an equidigital number, since it uses as much as digits as its factorization.

10639426649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79759.

The product of its (nonzero) digits is 1679616, while the sum is 50.

The spelling of 10639426649 in words is "ten billion, six hundred thirty-nine million, four hundred twenty-six thousand, six hundred forty-nine".