74186416321 has 2 divisors, whose sum is σ = 74186416322. Its totient is φ = 74186416320.

The previous prime is 74186416289. The next prime is 74186416357. The reversal of 74186416321 is 12361468147.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66067505296 + 8118911025 = 257036^2 + 90105^2 .

It is a cyclic number.

It is not a de Polignac number, because 74186416321 - 2⁵ = 74186416289 is a prime.

It is not a weakly prime, because it can be changed into another prime (74186476321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37093208160 + 37093208161.

It is an arithmetic number, because the mean of its divisors is an integer number (37093208161).

Almost surely, 2^74186416321 is an apocalyptic number.

It is an amenable number.

74186416321 is a deficient number, since it is larger than the sum of its proper divisors (1).

74186416321 is an equidigital number, since it uses as much as digits as its factorization.

74186416321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The spelling of 74186416321 in words is "seventy-four billion, one hundred eighty-six million, four hundred sixteen thousand, three hundred twenty-one".