74671817647 has 16 divisors (see below), whose sum is σ = 86972461312. Its totient is φ = 62787415680.

The previous prime is 74671817617. The next prime is 74671817677.

74671817647 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (74671817617) and next prime (74671817677).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74671817647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74671817591 and 74671817600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74671817617) 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, 217293 + ... + 443350.

It is an arithmetic number, because the mean of its divisors is an integer number (5435778832).

Almost surely, 2^74671817647 is an apocalyptic number.

74671817647 is a deficient number, since it is larger than the sum of its proper divisors (12300643665).

74671817647 is a wasteful number, since it uses less digits than its factorization.

74671817647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660958.

The product of its digits is 11063808, while the sum is 58.

The spelling of 74671817647 in words is "seventy-four billion, six hundred seventy-one million, eight hundred seventeen thousand, six hundred forty-seven".