8621991126 has 96 divisors (see below), whose sum is σ = 22070071296. Its totient is φ = 2380536000.

The previous prime is 8621991101. The next prime is 8621991151. The reversal of 8621991126 is 6211991268.

8621991126 is a `hidden beast` number, since 8 + 621 + 9 + 9 + 1 + 12 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (8621991101) and next prime (8621991151).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4026016 + ... + 4028156.

It is an arithmetic number, because the mean of its divisors is an integer number (229896576).

Almost surely, 2^8621991126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8621991126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11035035648).

8621991126 is an abundant number, since it is smaller than the sum of its proper divisors (13448080170).

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

8621991126 is a wasteful number, since it uses less digits than its factorization.

8621991126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 3215 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 8621991126 is about 92854.6774589196. The cubic root of 8621991126 is about 2050.5444618474.

The spelling of 8621991126 in words is "eight billion, six hundred twenty-one million, nine hundred ninety-one thousand, one hundred twenty-six".