287855846381 has 2 divisors, whose sum is σ = 287855846382. Its totient is φ = 287855846380.

The previous prime is 287855846351. The next prime is 287855846413. The reversal of 287855846381 is 183648558782.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239087749156 + 48768097225 = 488966^2 + 220835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-287855846381 is a prime.

It is a super-2 number, since 2×287855846381² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287855846351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143927923190 + 143927923191.

It is an arithmetic number, because the mean of its divisors is an integer number (143927923191).

Almost surely, 2^287855846381 is an apocalyptic number.

It is an amenable number.

287855846381 is a deficient number, since it is larger than the sum of its proper divisors (1).

287855846381 is an equidigital number, since it uses as much as digits as its factorization.

287855846381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103219200, while the sum is 65.

The spelling of 287855846381 in words is "two hundred eighty-seven billion, eight hundred fifty-five million, eight hundred forty-six thousand, three hundred eighty-one".