74451815447 has 2 divisors, whose sum is σ = 74451815448. Its totient is φ = 74451815446.

The previous prime is 74451815411. The next prime is 74451815461.

74451815447 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 74451815447 - 2¹² = 74451811351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74451815395 and 74451815404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74451815497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37225907723 + 37225907724.

It is an arithmetic number, because the mean of its divisors is an integer number (37225907724).

Almost surely, 2^74451815447 is an apocalyptic number.

74451815447 is a deficient number, since it is larger than the sum of its proper divisors (1).

74451815447 is an equidigital number, since it uses as much as digits as its factorization.

74451815447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2508800, while the sum is 50.

The spelling of 74451815447 in words is "seventy-four billion, four hundred fifty-one million, eight hundred fifteen thousand, four hundred forty-seven".