87135566850 has 36 divisors (see below), whose sum is σ = 234104224146. Its totient is φ = 23236151040.

The previous prime is 87135566849. The next prime is 87135566879. The reversal of 87135566850 is 5866553178.

87135566850 is a `hidden beast` number, since 8 + 7 + 1 + 3 + 556 + 6 + 85 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 51127088769 + 36008478081 = 226113^2 + 189759^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 96816847 + ... + 96817746.

Almost surely, 2^87135566850 is an apocalyptic number.

87135566850 is an abundant number, since it is smaller than the sum of its proper divisors (146968657296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87135566850 is a wasteful number, since it uses less digits than its factorization.

87135566850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193634611 (or 193634603 counting only the distinct ones).

The product of its (nonzero) digits is 6048000, while the sum is 54.

The spelling of 87135566850 in words is "eighty-seven billion, one hundred thirty-five million, five hundred sixty-six thousand, eight hundred fifty".