200899784781 has 24 divisors (see below), whose sum is σ = 303654775320. Its totient is φ = 127854619776.

The previous prime is 200899784651. The next prime is 200899784803. The reversal of 200899784781 is 187487998002.

200899784781 is a `hidden beast` number, since 2 + 0 + 0 + 8 + 99 + 78 + 478 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 72742944681 + 128156840100 = 269709^2 + 357990^2 .

It is not a de Polignac number, because 200899784781 - 2¹⁵ = 200899752013 is a prime.

It is a super-2 number, since 2×200899784781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200899784081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5673886 + ... + 5709183.

It is an arithmetic number, because the mean of its divisors is an integer number (12652282305).

Almost surely, 2^200899784781 is an apocalyptic number.

It is an amenable number.

200899784781 is a deficient number, since it is larger than the sum of its proper divisors (102754990539).

200899784781 is a wasteful number, since it uses less digits than its factorization.

200899784781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11383165 (or 11383162 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 63.

The spelling of 200899784781 in words is "two hundred billion, eight hundred ninety-nine million, seven hundred eighty-four thousand, seven hundred eighty-one".