6749154012649 has 2 divisors, whose sum is σ = 6749154012650. Its totient is φ = 6749154012648.

The previous prime is 6749154012637. The next prime is 6749154012697. The reversal of 6749154012649 is 9462104519476.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6727565000025 + 21589012624 = 2593755^2 + 146932^2 .

It is a cyclic number.

It is not a de Polignac number, because 6749154012649 - 2¹¹ = 6749154010601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6749154012593 and 6749154012602.

It is not a weakly prime, because it can be changed into another prime (6749154042649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3374577006324 + 3374577006325.

It is an arithmetic number, because the mean of its divisors is an integer number (3374577006325).

Almost surely, 2^{6749154012649} is an apocalyptic number.

It is an amenable number.

6749154012649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6749154012649 is an equidigital number, since it uses as much as digits as its factorization.

6749154012649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 58.

The spelling of 6749154012649 in words is "six trillion, seven hundred forty-nine billion, one hundred fifty-four million, twelve thousand, six hundred forty-nine".