74487555578447 has 16 divisors (see below), whose sum is σ = 81363269694240. Its totient is φ = 67629204931200.

The previous prime is 74487555578389. The next prime is 74487555578483.

74487555578447 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 74487555578447 - 2³⁶ = 74418836101711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74487552578447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147250829 + ... + 147755817.

It is an arithmetic number, because the mean of its divisors is an integer number (5085204355890).

Almost surely, 2^{74487555578447} is an apocalyptic number.

74487555578447 is a deficient number, since it is larger than the sum of its proper divisors (6875714115793).

74487555578447 is a wasteful number, since it uses less digits than its factorization.

74487555578447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522154.

The product of its digits is 24586240000, while the sum is 80.

The spelling of 74487555578447 in words is "seventy-four trillion, four hundred eighty-seven billion, five hundred fifty-five million, five hundred seventy-eight thousand, four hundred forty-seven".