800001438849 has 12 divisors (see below), whose sum is σ = 1159729325716. Its totient is φ = 531408896352.

The previous prime is 800001438811. The next prime is 800001438869. The reversal of 800001438849 is 948834100008.

It can be written as a sum of positive squares in 2 ways, for example, as 494405859600 + 305595579249 = 703140^2 + 552807^2 .

It is not a de Polignac number, because 800001438849 - 2¹⁶ = 800001373313 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 (800001438869) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160447054 + ... + 160452039.

Almost surely, 2^800001438849 is an apocalyptic number.

It is an amenable number.

800001438849 is a deficient number, since it is larger than the sum of its proper divisors (359727886867).

800001438849 is a wasteful number, since it uses less digits than its factorization.

800001438849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320899376 (or 320899373 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 800001438849 in words is "eight hundred billion, one million, four hundred thirty-eight thousand, eight hundred forty-nine".