12749740547779 has 2 divisors, whose sum is σ = 12749740547780. Its totient is φ = 12749740547778.

The previous prime is 12749740547777. The next prime is 12749740547827. The reversal of 12749740547779 is 97774504794721.

12749740547779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12749740547779 - 2¹ = 12749740547777 is a prime.

Together with 12749740547777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12749740547777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374870273889 + 6374870273890.

It is an arithmetic number, because the mean of its divisors is an integer number (6374870273890).

Almost surely, 2^{12749740547779} is an apocalyptic number.

12749740547779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12749740547779 is an equidigital number, since it uses as much as digits as its factorization.

12749740547779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 871274880, while the sum is 73.

The spelling of 12749740547779 in words is "twelve trillion, seven hundred forty-nine billion, seven hundred forty million, five hundred forty-seven thousand, seven hundred seventy-nine".