74894052809 has 2 divisors, whose sum is σ = 74894052810. Its totient is φ = 74894052808.

The previous prime is 74894052787. The next prime is 74894052811. The reversal of 74894052809 is 90825049847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68734157584 + 6159895225 = 262172^2 + 78485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74894052809 is a prime.

It is a super-3 number, since 3×74894052809³ (a number of 34 digits) contains 333 as substring.

Together with 74894052811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74894058809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37447026404 + 37447026405.

It is an arithmetic number, because the mean of its divisors is an integer number (37447026405).

Almost surely, 2^74894052809 is an apocalyptic number.

It is an amenable number.

74894052809 is a deficient number, since it is larger than the sum of its proper divisors (1).

74894052809 is an equidigital number, since it uses as much as digits as its factorization.

74894052809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 74894052809 in words is "seventy-four billion, eight hundred ninety-four million, fifty-two thousand, eight hundred nine".