3847391828201 has 4 divisors (see below), whose sum is σ = 3847762886100. Its totient is φ = 3847020770304.

The previous prime is 3847391828177. The next prime is 3847391828207. The reversal of 3847391828201 is 1028281937483.

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

It can be written as a sum of positive squares in 2 ways, for example, as 349186446400 + 3498205381801 = 590920^2 + 1870349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3847391828201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3847391828207) 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, 185513396 + ... + 185534133.

It is an arithmetic number, because the mean of its divisors is an integer number (961940721525).

Almost surely, 2^{3847391828201} is an apocalyptic number.

It is an amenable number.

3847391828201 is a deficient number, since it is larger than the sum of its proper divisors (371057899).

3847391828201 is a wasteful number, since it uses less digits than its factorization.

3847391828201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371057898.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 3847391828201 in words is "three trillion, eight hundred forty-seven billion, three hundred ninety-one million, eight hundred twenty-eight thousand, two hundred one".