200001780217872 has 30 divisors (see below), whose sum is σ = 559727204360142. Its totient is φ = 66667260072576.

The previous prime is 200001780217849. The next prime is 200001780217903. The reversal of 200001780217872 is 278712087100002.

It can be written as a sum of positive squares in only one way, i.e., 176156177043456 + 23845603174416 = 13272384^2 + 4883196^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 694450625613 + ... + 694450625900.

Almost surely, 2^{200001780217872} is an apocalyptic number.

It is an amenable number.

200001780217872 is an abundant number, since it is smaller than the sum of its proper divisors (359725424142270).

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

200001780217872 is a wasteful number, since it uses less digits than its factorization.

200001780217872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1388901251527 (or 1388901251518 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The spelling of 200001780217872 in words is "two hundred trillion, one billion, seven hundred eighty million, two hundred seventeen thousand, eight hundred seventy-two".