74838608557 has 2 divisors, whose sum is σ = 74838608558. Its totient is φ = 74838608556.

The previous prime is 74838608531. The next prime is 74838608569. The reversal of 74838608557 is 75580683847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68043244201 + 6795364356 = 260851^2 + 82434^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74838608557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74838608495 and 74838608504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74838608357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37419304278 + 37419304279.

It is an arithmetic number, because the mean of its divisors is an integer number (37419304279).

Almost surely, 2^74838608557 is an apocalyptic number.

It is an amenable number.

74838608557 is a deficient number, since it is larger than the sum of its proper divisors (1).

74838608557 is an equidigital number, since it uses as much as digits as its factorization.

74838608557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45158400, while the sum is 61.

The spelling of 74838608557 in words is "seventy-four billion, eight hundred thirty-eight million, six hundred eight thousand, five hundred fifty-seven".