199148042440 has 16 divisors (see below), whose sum is σ = 448083095580. Its totient is φ = 79659216960.

The previous prime is 199148042437. The next prime is 199148042473. The reversal of 199148042440 is 44240841991.

It can be written as a sum of positive squares in 2 ways, for example, as 198126472996 + 1021569444 = 445114^2 + 31962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2489350491 + ... + 2489350570.

Almost surely, 2^199148042440 is an apocalyptic number.

199148042440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199148042440 is an abundant number, since it is smaller than the sum of its proper divisors (248935053140).

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

199148042440 is a wasteful number, since it uses less digits than its factorization.

199148042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4978701072 (or 4978701068 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 199148042440 in words is "one hundred ninety-nine billion, one hundred forty-eight million, forty-two thousand, four hundred forty".