199338266440 has 32 divisors (see below), whose sum is σ = 448531188480. Its totient is φ = 79731735232.

The previous prime is 199338266437. The next prime is 199338266497. The reversal of 199338266440 is 44662833991.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 907497 + ... + 1105543.

It is an arithmetic number, because the mean of its divisors is an integer number (14016599640).

Almost surely, 2^199338266440 is an apocalyptic number.

199338266440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199338266440 is an abundant number, since it is smaller than the sum of its proper divisors (249192922040).

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

199338266440 is a wasteful number, since it uses less digits than its factorization.

199338266440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223221 (or 223217 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 199338266440 in words is "one hundred ninety-nine billion, three hundred thirty-eight million, two hundred sixty-six thousand, four hundred forty".