74771639093 has 2 divisors, whose sum is σ = 74771639094. Its totient is φ = 74771639092.

The previous prime is 74771639083. The next prime is 74771639149. The reversal of 74771639093 is 39093617747.

It is an a-pointer prime, because the next prime (74771639149) can be obtained adding 74771639093 to its sum of digits (56).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62904151249 + 11867487844 = 250807^2 + 108938^2 .

It is a cyclic number.

It is not a de Polignac number, because 74771639093 - 2⁴ = 74771639077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74771639083) 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, 37385819546 + 37385819547.

It is an arithmetic number, because the mean of its divisors is an integer number (37385819547).

Almost surely, 2^74771639093 is an apocalyptic number.

It is an amenable number.

74771639093 is a deficient number, since it is larger than the sum of its proper divisors (1).

74771639093 is an equidigital number, since it uses as much as digits as its factorization.

74771639093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6001128, while the sum is 56.

The spelling of 74771639093 in words is "seventy-four billion, seven hundred seventy-one million, six hundred thirty-nine thousand, ninety-three".