74543634547 has 12 divisors (see below), whose sum is σ = 79246382040. Its totient is φ = 70094058848.

The previous prime is 74543634541. The next prime is 74543634551.

74543634547 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74543634547 - 2¹⁵ = 74543601779 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74543634494 and 74543634503.

It is not an unprimeable number, because it can be changed into a prime (74543634541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1162978 + ... + 1225399.

It is an arithmetic number, because the mean of its divisors is an integer number (6603865170).

Almost surely, 2^74543634547 is an apocalyptic number.

74543634547 is a deficient number, since it is larger than the sum of its proper divisors (4702747493).

74543634547 is a wasteful number, since it uses less digits than its factorization.

74543634547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388482 (or 2388459 counting only the distinct ones).

The product of its digits is 16934400, while the sum is 52.

The spelling of 74543634547 in words is "seventy-four billion, five hundred forty-three million, six hundred thirty-four thousand, five hundred forty-seven".