7430778040249 has 2 divisors, whose sum is σ = 7430778040250. Its totient is φ = 7430778040248.

The previous prime is 7430778040247. The next prime is 7430778040271. The reversal of 7430778040249 is 9420408770347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4455084039849 + 2975694000400 = 2110707^2 + 1725020^2 .

It is a cyclic number.

It is not a de Polignac number, because 7430778040249 - 2¹ = 7430778040247 is a prime.

Together with 7430778040247, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 7430778040249.

It is not a weakly prime, because it can be changed into another prime (7430778040241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3715389020124 + 3715389020125.

It is an arithmetic number, because the mean of its divisors is an integer number (3715389020125).

Almost surely, 2^{7430778040249} is an apocalyptic number.

It is an amenable number.

7430778040249 is a deficient number, since it is larger than the sum of its proper divisors (1).

7430778040249 is an equidigital number, since it uses as much as digits as its factorization.

7430778040249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9483264, while the sum is 55.

The spelling of 7430778040249 in words is "seven trillion, four hundred thirty billion, seven hundred seventy-eight million, forty thousand, two hundred forty-nine".