648418365947 has 4 divisors (see below), whose sum is σ = 707365490136. Its totient is φ = 589471241760.

The previous prime is 648418365929. The next prime is 648418366027. The reversal of 648418365947 is 749563814846.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 648418365947 - 2³⁰ = 647344624123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648418365247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29473562078 + ... + 29473562099.

It is an arithmetic number, because the mean of its divisors is an integer number (176841372534).

Almost surely, 2^648418365947 is an apocalyptic number.

648418365947 is a deficient number, since it is larger than the sum of its proper divisors (58947124189).

648418365947 is a wasteful number, since it uses less digits than its factorization.

648418365947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58947124188.

The product of its digits is 139345920, while the sum is 65.

The spelling of 648418365947 in words is "six hundred forty-eight billion, four hundred eighteen million, three hundred sixty-five thousand, nine hundred forty-seven".