199278826448 has 20 divisors (see below), whose sum is σ = 415802936388. Its totient is φ = 91974842880.

The previous prime is 199278826441. The next prime is 199278826451. The reversal of 199278826448 is 844628872991.

It can be written as a sum of positive squares in 2 ways, for example, as 118481900944 + 80796925504 = 344212^2 + 284248^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199278826441) 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, 479035433 + ... + 479035848.

Almost surely, 2^199278826448 is an apocalyptic number.

It is an amenable number.

199278826448 is an abundant number, since it is smaller than the sum of its proper divisors (216524109940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199278826448 is a wasteful number, since it uses less digits than its factorization.

199278826448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958071302 (or 958071296 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 68.

The spelling of 199278826448 in words is "one hundred ninety-nine billion, two hundred seventy-eight million, eight hundred twenty-six thousand, four hundred forty-eight".