87443656261321 has 8 divisors (see below), whose sum is σ = 88877772734024. Its totient is φ = 86009559592320.

The previous prime is 87443656261279. The next prime is 87443656261421. The reversal of 87443656261321 is 12316265634478.

It can be written as a sum of positive squares in 4 ways, for example, as 16329196083600 + 71114460177721 = 4040940^2 + 8432939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87443656261321 - 2³¹ = 87441508777673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87443656261021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4086715 + ... + 13841551.

It is an arithmetic number, because the mean of its divisors is an integer number (11109721591753).

Almost surely, 2^{87443656261321} is an apocalyptic number.

It is an amenable number.

87443656261321 is a deficient number, since it is larger than the sum of its proper divisors (1434116472703).

87443656261321 is a wasteful number, since it uses less digits than its factorization.

87443656261321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9901851.

The product of its digits is 34836480, while the sum is 58.

The spelling of 87443656261321 in words is "eighty-seven trillion, four hundred forty-three billion, six hundred fifty-six million, two hundred sixty-one thousand, three hundred twenty-one".