87605187811 has 4 divisors (see below), whose sum is σ = 88423927992. Its totient is φ = 86786447632.

The previous prime is 87605187781. The next prime is 87605187841. The reversal of 87605187811 is 11878150678.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87605187781) and next prime (87605187841).

It is a cyclic number.

It is not a de Polignac number, because 87605187811 - 2⁵ = 87605187779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87605187841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409369930 + ... + 409370143.

It is an arithmetic number, because the mean of its divisors is an integer number (22105981998).

Almost surely, 2^87605187811 is an apocalyptic number.

87605187811 is a deficient number, since it is larger than the sum of its proper divisors (818740181).

87605187811 is a wasteful number, since it uses less digits than its factorization.

87605187811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818740180.

The product of its (nonzero) digits is 752640, while the sum is 52.

The spelling of 87605187811 in words is "eighty-seven billion, six hundred five million, one hundred eighty-seven thousand, eight hundred eleven".