74355311809 has 2 divisors, whose sum is σ = 74355311810. Its totient is φ = 74355311808.

The previous prime is 74355311753. The next prime is 74355311813. The reversal of 74355311809 is 90811355347.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44762711184 + 29592600625 = 211572^2 + 172025^2 .

It is a cyclic number.

It is not a de Polignac number, because 74355311809 - 2¹¹ = 74355309761 is a prime.

It is a super-2 number, since 2×74355311809² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74355311309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37177655904 + 37177655905.

It is an arithmetic number, because the mean of its divisors is an integer number (37177655905).

Almost surely, 2^74355311809 is an apocalyptic number.

It is an amenable number.

74355311809 is a deficient number, since it is larger than the sum of its proper divisors (1).

74355311809 is an equidigital number, since it uses as much as digits as its factorization.

74355311809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 74355311809 in words is "seventy-four billion, three hundred fifty-five million, three hundred eleven thousand, eight hundred nine".