74445745 has 16 divisors (see below), whose sum is σ = 97634880. Its totient is φ = 54043200.

The previous prime is 74445731. The next prime is 74445769. The reversal of 74445745 is 54754447.

It is a de Polignac number, because none of the positive numbers 2^k-74445745 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74445698 and 74445707.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 43771 + ... + 45439.

It is an arithmetic number, because the mean of its divisors is an integer number (6102180).

Almost surely, 2^74445745 is an apocalyptic number.

It is an amenable number.

74445745 is a deficient number, since it is larger than the sum of its proper divisors (23189135).

74445745 is a wasteful number, since it uses less digits than its factorization.

74445745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496.

The product of its digits is 313600, while the sum is 40.

The square root of 74445745 is about 8628.1947706342. The cubic root of 74445745 is about 420.6749257960.

The spelling of 74445745 in words is "seventy-four million, four hundred forty-five thousand, seven hundred forty-five".