12649728799 has 2 divisors, whose sum is σ = 12649728800. Its totient is φ = 12649728798.

The previous prime is 12649728779. The next prime is 12649728809. The reversal of 12649728799 is 99782794621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12649728799 - 2³¹ = 10502245151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12649728799.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12649728769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6324864399 + 6324864400.

It is an arithmetic number, because the mean of its divisors is an integer number (6324864400).

Almost surely, 2^12649728799 is an apocalyptic number.

12649728799 is a deficient number, since it is larger than the sum of its proper divisors (1).

12649728799 is an equidigital number, since it uses as much as digits as its factorization.

12649728799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 64.

The spelling of 12649728799 in words is "twelve billion, six hundred forty-nine million, seven hundred twenty-eight thousand, seven hundred ninety-nine".