6149681957 has 2 divisors, whose sum is σ = 6149681958. Its totient is φ = 6149681956.

The previous prime is 6149681933. The next prime is 6149682059. The reversal of 6149681957 is 7591869416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5398428676 + 751253281 = 73474^2 + 27409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6149681957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6149581957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3074840978 + 3074840979.

It is an arithmetic number, because the mean of its divisors is an integer number (3074840979).

Almost surely, 2^6149681957 is an apocalyptic number.

It is an amenable number.

6149681957 is a deficient number, since it is larger than the sum of its proper divisors (1).

6149681957 is an equidigital number, since it uses as much as digits as its factorization.

6149681957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 56.

The square root of 6149681957 is about 78419.9079124682. The cubic root of 6149681957 is about 1832.1072163062.

The spelling of 6149681957 in words is "six billion, one hundred forty-nine million, six hundred eighty-one thousand, nine hundred fifty-seven".