74896343613809 has 4 divisors (see below), whose sum is σ = 74940582448116. Its totient is φ = 74852104779504.

The previous prime is 74896343613779. The next prime is 74896343613887. The reversal of 74896343613809 is 90831634369847.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47341665558784 + 27554678055025 = 6880528^2 + 5249255^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74896343613809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74896343613709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22119414614 + ... + 22119417999.

It is an arithmetic number, because the mean of its divisors is an integer number (18735145612029).

Almost surely, 2^{74896343613809} is an apocalyptic number.

It is an amenable number.

74896343613809 is a deficient number, since it is larger than the sum of its proper divisors (44238834307).

74896343613809 is a wasteful number, since it uses less digits than its factorization.

74896343613809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44238834306.

The product of its (nonzero) digits is 564350976, while the sum is 71.

The spelling of 74896343613809 in words is "seventy-four trillion, eight hundred ninety-six billion, three hundred forty-three million, six hundred thirteen thousand, eight hundred nine".