15793806649 has 4 divisors (see below), whose sum is σ = 15794113060. Its totient is φ = 15793500240.

The previous prime is 15793806607. The next prime is 15793806689. The reversal of 15793806649 is 94660839751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8293380624 + 7500426025 = 91068^2 + 86605^2 .

It is a cyclic number.

It is not a de Polignac number, because 15793806649 - 2¹¹ = 15793804601 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15793806593 and 15793806602.

It is not an unprimeable number, because it can be changed into a prime (15793806689) 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, 54834 + ... + 185995.

It is an arithmetic number, because the mean of its divisors is an integer number (3948528265).

Almost surely, 2^15793806649 is an apocalyptic number.

It is an amenable number.

15793806649 is a deficient number, since it is larger than the sum of its proper divisors (306411).

15793806649 is an equidigital number, since it uses as much as digits as its factorization.

15793806649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306410.

The product of its (nonzero) digits is 9797760, while the sum is 58.

The spelling of 15793806649 in words is "fifteen billion, seven hundred ninety-three million, eight hundred six thousand, six hundred forty-nine".