287855798405 has 16 divisors (see below), whose sum is σ = 395911359360. Its totient is φ = 196817986752.

The previous prime is 287855798389. The next prime is 287855798413. The reversal of 287855798405 is 504897558782.

It is a cyclic number.

It is not a de Polignac number, because 287855798405 - 2⁴ = 287855798389 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11838650 + ... + 11862939.

It is an arithmetic number, because the mean of its divisors is an integer number (24744459960).

Almost surely, 2^287855798405 is an apocalyptic number.

It is an amenable number.

287855798405 is a deficient number, since it is larger than the sum of its proper divisors (108055560955).

287855798405 is a wasteful number, since it uses less digits than its factorization.

287855798405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23701948.

The product of its (nonzero) digits is 225792000, while the sum is 68.

The spelling of 287855798405 in words is "two hundred eighty-seven billion, eight hundred fifty-five million, seven hundred ninety-eight thousand, four hundred five".