64333917647 has 8 divisors (see below), whose sum is σ = 66078675456. Its totient is φ = 62589475872.

The previous prime is 64333917601. The next prime is 64333917671. The reversal of 64333917647 is 74671933346.

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

It is not a de Polignac number, because 64333917647 - 2²⁴ = 64317140431 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 (64333907647) 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, 367373 + ... + 513449.

It is an arithmetic number, because the mean of its divisors is an integer number (8259834432).

Almost surely, 2^64333917647 is an apocalyptic number.

64333917647 is a deficient number, since it is larger than the sum of its proper divisors (1744757809).

64333917647 is a wasteful number, since it uses less digits than its factorization.

64333917647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158017.

The product of its digits is 6858432, while the sum is 53.

The spelling of 64333917647 in words is "sixty-four billion, three hundred thirty-three million, nine hundred seventeen thousand, six hundred forty-seven".