74412821447 has 16 divisors (see below), whose sum is σ = 80573139072. Its totient is φ = 68460387840.

The previous prime is 74412821443. The next prime is 74412821477.

It is a happy number.

74412821447 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 74412821447 - 2² = 74412821443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74412821398 and 74412821407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74412821443) 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 in 15 ways as a sum of consecutive naturals, for example, 91793 + ... + 396549.

It is an arithmetic number, because the mean of its divisors is an integer number (5035821192).

Almost surely, 2^74412821447 is an apocalyptic number.

74412821447 is a deficient number, since it is larger than the sum of its proper divisors (6160317625).

74412821447 is a wasteful number, since it uses less digits than its factorization.

74412821447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305098.

The product of its digits is 401408, while the sum is 44.

The spelling of 74412821447 in words is "seventy-four billion, four hundred twelve million, eight hundred twenty-one thousand, four hundred forty-seven".