74511478445 has 4 divisors (see below), whose sum is σ = 89413774140. Its totient is φ = 59609182752.

The previous prime is 74511478441. The next prime is 74511478451. The reversal of 74511478445 is 54487411547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54487411547 = 31 ⋅1757658437.

It can be written as a sum of positive squares in 2 ways, for example, as 33102891364 + 41408587081 = 181942^2 + 203491^2 .

It is a cyclic number.

It is not a de Polignac number, because 74511478445 - 2² = 74511478441 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74511478393 and 74511478402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74511478441) 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, 7451147840 + ... + 7451147849.

It is an arithmetic number, because the mean of its divisors is an integer number (22353443535).

Almost surely, 2^74511478445 is an apocalyptic number.

It is an amenable number.

74511478445 is a deficient number, since it is larger than the sum of its proper divisors (14902295695).

74511478445 is a wasteful number, since it uses less digits than its factorization.

74511478445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14902295694.

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

The spelling of 74511478445 in words is "seventy-four billion, five hundred eleven million, four hundred seventy-eight thousand, four hundred forty-five".