4994578457749 has 2 divisors, whose sum is σ = 4994578457750. Its totient is φ = 4994578457748.

The previous prime is 4994578457707. The next prime is 4994578457773. The reversal of 4994578457749 is 9477548754994.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3184732914724 + 1809845543025 = 1784582^2 + 1345305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4994578457749 is a prime.

It is a super-2 number, since 2×4994578457749² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4994578457789) 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, 2497289228874 + 2497289228875.

It is an arithmetic number, because the mean of its divisors is an integer number (2497289228875).

Almost surely, 2^{4994578457749} is an apocalyptic number.

It is an amenable number.

4994578457749 is a deficient number, since it is larger than the sum of its proper divisors (1).

4994578457749 is an equidigital number, since it uses as much as digits as its factorization.

4994578457749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12802406400, while the sum is 82.

The spelling of 4994578457749 in words is "four trillion, nine hundred ninety-four billion, five hundred seventy-eight million, four hundred fifty-seven thousand, seven hundred forty-nine".