74646864647 has 8 divisors (see below), whose sum is σ = 75258537312. Its totient is φ = 74036736000.

The previous prime is 74646864641. The next prime is 74646864653.

74646864647 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (74646864641) and next prime (74646864653).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74646864647 - 2⁶ = 74646864583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74646864647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74646864641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288818 + ... + 482399.

It is an arithmetic number, because the mean of its divisors is an integer number (9407317164).

Almost surely, 2^74646864647 is an apocalyptic number.

74646864647 is a deficient number, since it is larger than the sum of its proper divisors (611672665).

74646864647 is a wasteful number, since it uses less digits than its factorization.

74646864647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772009.

The product of its digits is 130056192, while the sum is 62.

The spelling of 74646864647 in words is "seventy-four billion, six hundred forty-six million, eight hundred sixty-four thousand, six hundred forty-seven".