74484643491 has 12 divisors (see below), whose sum is σ = 107932668168. Its totient is φ = 49497780384.

The previous prime is 74484643451. The next prime is 74484643511. The reversal of 74484643491 is 19434648447.

It is a happy number.

74484643491 is a `hidden beast` number, since 7 + 44 + 84 + 6 + 434 + 91 = 666.

It is not a de Polignac number, because 74484643491 - 2¹¹ = 74484641443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74484643451) 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 11 ways as a sum of consecutive naturals, for example, 13217745 + ... + 13223378.

It is an arithmetic number, because the mean of its divisors is an integer number (8994389014).

Almost surely, 2^74484643491 is an apocalyptic number.

74484643491 is a deficient number, since it is larger than the sum of its proper divisors (33448024677).

74484643491 is a wasteful number, since it uses less digits than its factorization.

74484643491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26441442 (or 26441439 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 54.

The spelling of 74484643491 in words is "seventy-four billion, four hundred eighty-four million, six hundred forty-three thousand, four hundred ninety-one".