74251973749 has 2 divisors, whose sum is σ = 74251973750. Its totient is φ = 74251973748.

The previous prime is 74251973639. The next prime is 74251973813. The reversal of 74251973749 is 94737915247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62891611524 + 11360362225 = 250782^2 + 106585^2 .

It is an emirp because it is prime and its reverse (94737915247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74251973749 - 2¹¹ = 74251971701 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74251973693 and 74251973702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74251973449) 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, 37125986874 + 37125986875.

It is an arithmetic number, because the mean of its divisors is an integer number (37125986875).

Almost surely, 2^74251973749 is an apocalyptic number.

It is an amenable number.

74251973749 is a deficient number, since it is larger than the sum of its proper divisors (1).

74251973749 is an equidigital number, since it uses as much as digits as its factorization.

74251973749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13335840, while the sum is 58.

The spelling of 74251973749 in words is "seventy-four billion, two hundred fifty-one million, nine hundred seventy-three thousand, seven hundred forty-nine".