74475257447 has 4 divisors (see below), whose sum is σ = 74496293256. Its totient is φ = 74454221640.

The previous prime is 74475257371. The next prime is 74475257453.

74475257447 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 74475257447 - 2⁸ = 74475257191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74475257392 and 74475257401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74475257477) 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 3 ways as a sum of consecutive naturals, for example, 10512593 + ... + 10519674.

It is an arithmetic number, because the mean of its divisors is an integer number (18624073314).

Almost surely, 2^74475257447 is an apocalyptic number.

74475257447 is a deficient number, since it is larger than the sum of its proper divisors (21035809).

74475257447 is a wasteful number, since it uses less digits than its factorization.

74475257447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21035808.

The product of its digits is 30732800, while the sum is 56.

The spelling of 74475257447 in words is "seventy-four billion, four hundred seventy-five million, two hundred fifty-seven thousand, four hundred forty-seven".