7875844861 has 4 divisors (see below), whose sum is σ = 7876382112. Its totient is φ = 7875307612.

The previous prime is 7875844829. The next prime is 7875844877. The reversal of 7875844861 is 1684485787.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7875844861 - 2⁵ = 7875844829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7875844796 and 7875844805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7875844061) 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, 246001 + ... + 276166.

It is an arithmetic number, because the mean of its divisors is an integer number (1969095528).

Almost surely, 2^7875844861 is an apocalyptic number.

It is an amenable number.

7875844861 is a deficient number, since it is larger than the sum of its proper divisors (537251).

7875844861 is a wasteful number, since it uses less digits than its factorization.

7875844861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537250.

The product of its digits is 12042240, while the sum is 58.

The square root of 7875844861 is about 88745.9568712851. The cubic root of 7875844861 is about 1989.5997495575.

The spelling of 7875844861 in words is "seven billion, eight hundred seventy-five million, eight hundred forty-four thousand, eight hundred sixty-one".