74777278249 has 2 divisors, whose sum is σ = 74777278250. Its totient is φ = 74777278248.

The previous prime is 74777278181. The next prime is 74777278297. The reversal of 74777278249 is 94287277747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56577379600 + 18199898649 = 237860^2 + 134907^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74777278249 is a prime.

It is not a weakly prime, because it can be changed into another prime (74777278049) 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, 37388639124 + 37388639125.

It is an arithmetic number, because the mean of its divisors is an integer number (37388639125).

Almost surely, 2^74777278249 is an apocalyptic number.

It is an amenable number.

74777278249 is a deficient number, since it is larger than the sum of its proper divisors (1).

74777278249 is an equidigital number, since it uses as much as digits as its factorization.

74777278249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77446656, while the sum is 64.

The spelling of 74777278249 in words is "seventy-four billion, seven hundred seventy-seven million, two hundred seventy-eight thousand, two hundred forty-nine".