74800857613 has 2 divisors, whose sum is σ = 74800857614. Its totient is φ = 74800857612.

The previous prime is 74800857581. The next prime is 74800857643. The reversal of 74800857613 is 31675800847.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69821720644 + 4979136969 = 264238^2 + 70563^2 .

It is a cyclic number.

It is not a de Polignac number, because 74800857613 - 2⁵ = 74800857581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74800857643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37400428806 + 37400428807.

It is an arithmetic number, because the mean of its divisors is an integer number (37400428807).

Almost surely, 2^74800857613 is an apocalyptic number.

It is an amenable number.

74800857613 is a deficient number, since it is larger than the sum of its proper divisors (1).

74800857613 is an equidigital number, since it uses as much as digits as its factorization.

74800857613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 74800857613 in words is "seventy-four billion, eight hundred million, eight hundred fifty-seven thousand, six hundred thirteen".