87272514805205 has 4 divisors (see below), whose sum is σ = 104727017766252. Its totient is φ = 69818011844160.

The previous prime is 87272514805181. The next prime is 87272514805243. The reversal of 87272514805205 is 50250841527278.

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

It can be written as a sum of positive squares in 2 ways, for example, as 43310390209969 + 43962124595236 = 6581063^2 + 6630394^2 .

It is not a de Polignac number, because 87272514805205 - 2²⁴ = 87272498027989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8727251480516 + ... + 8727251480525.

It is an arithmetic number, because the mean of its divisors is an integer number (26181754441563).

Almost surely, 2^{87272514805205} is an apocalyptic number.

It is an amenable number.

87272514805205 is a deficient number, since it is larger than the sum of its proper divisors (17454502961047).

87272514805205 is a wasteful number, since it uses less digits than its factorization.

87272514805205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17454502961046.

The product of its (nonzero) digits is 12544000, while the sum is 56.

The spelling of 87272514805205 in words is "eighty-seven trillion, two hundred seventy-two billion, five hundred fourteen million, eight hundred five thousand, two hundred five".