12649035583 has 4 divisors (see below), whose sum is σ = 12957548688. Its totient is φ = 12340522480.

The previous prime is 12649035571. The next prime is 12649035593. The reversal of 12649035583 is 38553094621.

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

It is a cyclic number.

It is not a de Polignac number, because 12649035583 - 2¹⁷ = 12648904511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649035523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154256491 + ... + 154256572.

It is an arithmetic number, because the mean of its divisors is an integer number (3239387172).

Almost surely, 2^12649035583 is an apocalyptic number.

12649035583 is a deficient number, since it is larger than the sum of its proper divisors (308513105).

12649035583 is an equidigital number, since it uses as much as digits as its factorization.

12649035583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308513104.

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 12649035583 in words is "twelve billion, six hundred forty-nine million, thirty-five thousand, five hundred eighty-three".