287028587161 has 4 divisors (see below), whose sum is σ = 287050623412. Its totient is φ = 287006550912.

The previous prime is 287028587149. The next prime is 287028587177. The reversal of 287028587161 is 161785820782.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 170532657936 + 116495929225 = 412956^2 + 341315^2 .

It is a cyclic number.

It is not a de Polignac number, because 287028587161 - 2¹¹ = 287028585113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287028557161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10998576 + ... + 11024641.

It is an arithmetic number, because the mean of its divisors is an integer number (71762655853).

Almost surely, 2^287028587161 is an apocalyptic number.

It is an amenable number.

287028587161 is a deficient number, since it is larger than the sum of its proper divisors (22036251).

287028587161 is a wasteful number, since it uses less digits than its factorization.

287028587161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22036250.

The product of its (nonzero) digits is 3010560, while the sum is 55.

The spelling of 287028587161 in words is "two hundred eighty-seven billion, twenty-eight million, five hundred eighty-seven thousand, one hundred sixty-one".