7872865865 has 8 divisors (see below), whose sum is σ = 9752195328. Its totient is φ = 6095121840.

The previous prime is 7872865853. The next prime is 7872865877. The reversal of 7872865865 is 5685682787.

It is an interprime number because it is at equal distance from previous prime (7872865853) and next prime (7872865877).

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

It is not a de Polignac number, because 7872865865 - 2⁴ = 7872865849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7872865798 and 7872865807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25396187 + ... + 25396496.

It is an arithmetic number, because the mean of its divisors is an integer number (1219024416).

Almost surely, 2^7872865865 is an apocalyptic number.

It is an amenable number.

7872865865 is a deficient number, since it is larger than the sum of its proper divisors (1879329463).

7872865865 is a wasteful number, since it uses less digits than its factorization.

7872865865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50792719.

The product of its digits is 45158400, while the sum is 62.

The square root of 7872865865 is about 88729.1714432182. The cubic root of 7872865865 is about 1989.3488661181.

The spelling of 7872865865 in words is "seven billion, eight hundred seventy-two million, eight hundred sixty-five thousand, eight hundred sixty-five".