74536580491 has 2 divisors, whose sum is σ = 74536580492. Its totient is φ = 74536580490.

The previous prime is 74536580467. The next prime is 74536580551. The reversal of 74536580491 is 19408563547.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 74536580491 - 2²¹ = 74534483339 is a prime.

It is not a weakly prime, because it can be changed into another prime (74536580791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37268290245 + 37268290246.

It is an arithmetic number, because the mean of its divisors is an integer number (37268290246).

Almost surely, 2^74536580491 is an apocalyptic number.

74536580491 is a deficient number, since it is larger than the sum of its proper divisors (1).

74536580491 is an equidigital number, since it uses as much as digits as its factorization.

74536580491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3628800, while the sum is 52.

The spelling of 74536580491 in words is "seventy-four billion, five hundred thirty-six million, five hundred eighty thousand, four hundred ninety-one".