8125810851 has 4 divisors (see below), whose sum is σ = 10834414472. Its totient is φ = 5417207232.

The previous prime is 8125810843. The next prime is 8125810877. The reversal of 8125810851 is 1580185218.

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

It is not a de Polignac number, because 8125810851 - 2³ = 8125810843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8125810831) 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, 1354301806 + ... + 1354301811.

It is an arithmetic number, because the mean of its divisors is an integer number (2708603618).

Almost surely, 2^8125810851 is an apocalyptic number.

8125810851 is a deficient number, since it is larger than the sum of its proper divisors (2708603621).

8125810851 is a wasteful number, since it uses less digits than its factorization.

8125810851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708603620.

The product of its (nonzero) digits is 25600, while the sum is 39.

The square root of 8125810851 is about 90143.2795664768. The cubic root of 8125810851 is about 2010.4297531623.

The spelling of 8125810851 in words is "eight billion, one hundred twenty-five million, eight hundred ten thousand, eight hundred fifty-one".