8139871626 has 64 divisors (see below), whose sum is σ = 18369773568. Its totient is φ = 2390651648.

The previous prime is 8139871549. The next prime is 8139871627. The reversal of 8139871626 is 6261789318.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (8139871627) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73351 + ... + 147173.

It is an arithmetic number, because the mean of its divisors is an integer number (287027712).

Almost surely, 2^8139871626 is an apocalyptic number.

8139871626 is an abundant number, since it is smaller than the sum of its proper divisors (10229901942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8139871626 is a wasteful number, since it uses less digits than its factorization.

8139871626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73915.

The product of its digits is 870912, while the sum is 51.

The square root of 8139871626 is about 90221.2371118907. The cubic root of 8139871626 is about 2011.5886902677.

The spelling of 8139871626 in words is "eight billion, one hundred thirty-nine million, eight hundred seventy-one thousand, six hundred twenty-six".