87659669138 has 8 divisors (see below), whose sum is σ = 132224082480. Its totient is φ = 43584974980.

The previous prime is 87659669131. The next prime is 87659669171. The reversal of 87659669138 is 83196695678.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87659669131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122429348 + ... + 122430063.

It is an arithmetic number, because the mean of its divisors is an integer number (16528010310).

Almost surely, 2^87659669138 is an apocalyptic number.

87659669138 is a deficient number, since it is larger than the sum of its proper divisors (44564413342).

87659669138 is a wasteful number, since it uses less digits than its factorization.

87659669138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244859592.

The product of its digits is 117573120, while the sum is 68.

The spelling of 87659669138 in words is "eighty-seven billion, six hundred fifty-nine million, six hundred sixty-nine thousand, one hundred thirty-eight".