8711871851 has 4 divisors (see below), whose sum is σ = 9090648912. Its totient is φ = 8333094792.

The previous prime is 8711871821. The next prime is 8711871869. The reversal of 8711871851 is 1581781178.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1581781178 = 2 ⋅790890589.

It is a cyclic number.

It is not a de Polignac number, because 8711871851 - 2⁶ = 8711871787 is a prime.

It is a super-2 number, since 2×8711871851² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8711871796 and 8711871805.

It is not an unprimeable number, because it can be changed into a prime (8711871821) 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, 189388496 + ... + 189388541.

It is an arithmetic number, because the mean of its divisors is an integer number (2272662228).

Almost surely, 2^8711871851 is an apocalyptic number.

8711871851 is a deficient number, since it is larger than the sum of its proper divisors (378777061).

8711871851 is a wasteful number, since it uses less digits than its factorization.

8711871851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378777060.

The product of its digits is 125440, while the sum is 47.

The square root of 8711871851 is about 93337.4086366233. The cubic root of 8711871851 is about 2057.6452065569.

The spelling of 8711871851 in words is "eight billion, seven hundred eleven million, eight hundred seventy-one thousand, eight hundred fifty-one".