74860732181 has 2 divisors, whose sum is σ = 74860732182. Its totient is φ = 74860732180.

The previous prime is 74860732169. The next prime is 74860732213. The reversal of 74860732181 is 18123706847.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63298031281 + 11562700900 = 251591^2 + 107530^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74860732181 is a prime.

It is a super-2 number, since 2×74860732181² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74860732981) 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, 37430366090 + 37430366091.

It is an arithmetic number, because the mean of its divisors is an integer number (37430366091).

Almost surely, 2^74860732181 is an apocalyptic number.

It is an amenable number.

74860732181 is a deficient number, since it is larger than the sum of its proper divisors (1).

74860732181 is an equidigital number, since it uses as much as digits as its factorization.

74860732181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 47.

The spelling of 74860732181 in words is "seventy-four billion, eight hundred sixty million, seven hundred thirty-two thousand, one hundred eighty-one".