287648363861 has 2 divisors, whose sum is σ = 287648363862. Its totient is φ = 287648363860.

The previous prime is 287648363851. The next prime is 287648363879. The reversal of 287648363861 is 168363846782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201443880625 + 86204483236 = 448825^2 + 293606^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287648363861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 287648363794 and 287648363803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287648363801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143824181930 + 143824181931.

It is an arithmetic number, because the mean of its divisors is an integer number (143824181931).

Almost surely, 2^287648363861 is an apocalyptic number.

It is an amenable number.

287648363861 is a deficient number, since it is larger than the sum of its proper divisors (1).

287648363861 is an equidigital number, since it uses as much as digits as its factorization.

287648363861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55738368, while the sum is 62.

The spelling of 287648363861 in words is "two hundred eighty-seven billion, six hundred forty-eight million, three hundred sixty-three thousand, eight hundred sixty-one".