74671217647 has 32 divisors (see below), whose sum is σ = 82536330240. Its totient is φ = 67130394240.

The previous prime is 74671217633. The next prime is 74671217669.

74671217647 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-74671217647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 74671217594 and 74671217603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74671211647) 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 31 ways as a sum of consecutive naturals, for example, 76900872 + ... + 76901842.

It is an arithmetic number, because the mean of its divisors is an integer number (2579260320).

Almost surely, 2^74671217647 is an apocalyptic number.

74671217647 is a deficient number, since it is larger than the sum of its proper divisors (7865112593).

74671217647 is a wasteful number, since it uses less digits than its factorization.

74671217647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743.

The product of its digits is 2765952, while the sum is 52.

The spelling of 74671217647 in words is "seventy-four billion, six hundred seventy-one million, two hundred seventeen thousand, six hundred forty-seven".