199862826965640 has 48 divisors (see below), whose sum is σ = 649554187639500. Its totient is φ = 53296753857408.

The previous prime is 199862826965621. The next prime is 199862826965713. The reversal of 199862826965640 is 46569628268991.

It is a happy number.

199862826965640 is a `hidden beast` number, since 1 + 9 + 9 + 8 + 6 + 28 + 26 + 9 + 6 + 564 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 199287938495844 + 574888469796 = 14116938^2 + 758214^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 199862826965640.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277587259315 + ... + 277587260034.

Almost surely, 2^{199862826965640} is an apocalyptic number.

199862826965640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199862826965640 is an abundant number, since it is smaller than the sum of its proper divisors (449691360673860).

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

199862826965640 is a wasteful number, since it uses less digits than its factorization.

199862826965640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555174519366 (or 555174519359 counting only the distinct ones).

The product of its (nonzero) digits is 4837294080, while the sum is 81.

The spelling of 199862826965640 in words is "one hundred ninety-nine trillion, eight hundred sixty-two billion, eight hundred twenty-six million, nine hundred sixty-five thousand, six hundred forty".