287665715378887 has 12 divisors (see below), whose sum is σ = 297636948962080. Its totient is φ = 277981305185376.

The previous prime is 287665715378843. The next prime is 287665715378893. The reversal of 287665715378887 is 788873517566782.

It is not a de Polignac number, because 287665715378887 - 2²³ = 287665706990279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 287665715378798 and 287665715378807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287665715378807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 824030598 + ... + 824379619.

Almost surely, 2^{287665715378887} is an apocalyptic number.

287665715378887 is a deficient number, since it is larger than the sum of its proper divisors (9971233583193).

287665715378887 is an equidigital number, since it uses as much as digits as its factorization.

287665715378887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648410390 (or 1648410343 counting only the distinct ones).

The product of its digits is 53106278400, while the sum is 88.

The spelling of 287665715378887 in words is "two hundred eighty-seven trillion, six hundred sixty-five billion, seven hundred fifteen million, three hundred seventy-eight thousand, eight hundred eighty-seven".