287855878841 has 16 divisors (see below), whose sum is σ = 306895357440. Its totient is φ = 269570021760.

The previous prime is 287855878819. The next prime is 287855878873. The reversal of 287855878841 is 148878558782.

It is a cyclic number.

It is not a de Polignac number, because 287855878841 - 2⁶ = 287855878777 is a prime.

It is a super-2 number, since 2×287855878841² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (287855878441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1080071 + ... + 1319948.

It is an arithmetic number, because the mean of its divisors is an integer number (19180959840).

Almost surely, 2^287855878841 is an apocalyptic number.

It is an amenable number.

287855878841 is a deficient number, since it is larger than the sum of its proper divisors (19039478599).

287855878841 is a wasteful number, since it uses less digits than its factorization.

287855878841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400176.

The product of its digits is 321126400, while the sum is 71.

The spelling of 287855878841 in words is "two hundred eighty-seven billion, eight hundred fifty-five million, eight hundred seventy-eight thousand, eight hundred forty-one".