7942872865 has 8 divisors (see below), whose sum is σ = 9734244480. Its totient is φ = 6219100272.

The previous prime is 7942872859. The next prime is 7942872869. The reversal of 7942872865 is 5682782497.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 7942872865 - 2²⁵ = 7909318433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7942872869) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 16899495 + ... + 16899964.

It is an arithmetic number, because the mean of its divisors is an integer number (1216780560).

Almost surely, 2^7942872865 is an apocalyptic number.

It is an amenable number.

7942872865 is a deficient number, since it is larger than the sum of its proper divisors (1791371615).

7942872865 is a wasteful number, since it uses less digits than its factorization.

7942872865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33799511.

The product of its digits is 13547520, while the sum is 58.

The square root of 7942872865 is about 89122.7965506020. The cubic root of 7942872865 is about 1995.2280286167.

The spelling of 7942872865 in words is "seven billion, nine hundred forty-two million, eight hundred seventy-two thousand, eight hundred sixty-five".