87168444436 has 24 divisors (see below), whose sum is σ = 154287360360. Its totient is φ = 43086523392.

The previous prime is 87168444421. The next prime is 87168444437. The reversal of 87168444436 is 63444486178.

It can be written as a sum of positive squares in 4 ways, for example, as 50965771536 + 36202672900 = 225756^2 + 190270^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87168444437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207926 + ... + 2247058.

It is an arithmetic number, because the mean of its divisors is an integer number (6428640015).

Almost surely, 2^87168444436 is an apocalyptic number.

It is an amenable number.

87168444436 is a deficient number, since it is larger than the sum of its proper divisors (67118915924).

87168444436 is a wasteful number, since it uses less digits than its factorization.

87168444436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45483 (or 45481 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 55.

The spelling of 87168444436 in words is "eighty-seven billion, one hundred sixty-eight million, four hundred forty-four thousand, four hundred thirty-six".