201877804881 has 12 divisors (see below), whose sum is σ = 308754290052. Its totient is φ = 126668426496.

The previous prime is 201877804861. The next prime is 201877804889. The reversal of 201877804881 is 188408778102.

It is a happy number.

201877804881 is a `hidden beast` number, since 2 + 0 + 1 + 87 + 7 + 80 + 488 + 1 = 666.

201877804881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 181979881281 + 19897923600 = 426591^2 + 141060^2 .

It is not a de Polignac number, because 201877804881 - 2⁹ = 201877804369 is a prime.

It is a super-2 number, since 2×201877804881² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201877804889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659731236 + ... + 659731541.

It is an arithmetic number, because the mean of its divisors is an integer number (25729524171).

Almost surely, 2^201877804881 is an apocalyptic number.

It is an amenable number.

201877804881 is a deficient number, since it is larger than the sum of its proper divisors (106876485171).

201877804881 is a wasteful number, since it uses less digits than its factorization.

201877804881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319462800 (or 1319462797 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 54.

The spelling of 201877804881 in words is "two hundred one billion, eight hundred seventy-seven million, eight hundred four thousand, eight hundred eighty-one".