74786348557 has 2 divisors, whose sum is σ = 74786348558. Its totient is φ = 74786348556.

The previous prime is 74786348543. The next prime is 74786348621. The reversal of 74786348557 is 75584368747.

It is an a-pointer prime, because the next prime (74786348621) can be obtained adding 74786348557 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69372184996 + 5414163561 = 263386^2 + 73581^2 .

It is a cyclic number.

It is not a de Polignac number, because 74786348557 - 2¹⁵ = 74786315789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74786348657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37393174278 + 37393174279.

It is an arithmetic number, because the mean of its divisors is an integer number (37393174279).

Almost surely, 2^74786348557 is an apocalyptic number.

It is an amenable number.

74786348557 is a deficient number, since it is larger than the sum of its proper divisors (1).

74786348557 is an equidigital number, since it uses as much as digits as its factorization.

74786348557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158054400, while the sum is 64.

The spelling of 74786348557 in words is "seventy-four billion, seven hundred eighty-six million, three hundred forty-eight thousand, five hundred fifty-seven".