87478119865 has 4 divisors (see below), whose sum is σ = 104973743844. Its totient is φ = 69982495888.

The previous prime is 87478119853. The next prime is 87478119901. The reversal of 87478119865 is 56891187478.

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 10173546496 + 77304573369 = 100864^2 + 278037^2 .

It is a cyclic number.

It is not a de Polignac number, because 87478119865 - 2⁷ = 87478119737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87478119797 and 87478119806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8747811982 + ... + 8747811991.

It is an arithmetic number, because the mean of its divisors is an integer number (26243435961).

Almost surely, 2^87478119865 is an apocalyptic number.

It is an amenable number.

87478119865 is a deficient number, since it is larger than the sum of its proper divisors (17495623979).

87478119865 is a wasteful number, since it uses less digits than its factorization.

87478119865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17495623978.

The product of its digits is 27095040, while the sum is 64.

The spelling of 87478119865 in words is "eighty-seven billion, four hundred seventy-eight million, one hundred nineteen thousand, eight hundred sixty-five".