8113621000 has 64 divisors (see below), whose sum is σ = 19307808000. Its totient is φ = 3190417600.

The previous prime is 8113620959. The next prime is 8113621001. The reversal of 8113621000 is 1263118.

It is not an unprimeable number, because it can be changed into a prime (8113621001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9760 + ... + 127759.

It is an arithmetic number, because the mean of its divisors is an integer number (301684500).

Almost surely, 2^8113621000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8113621000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9653904000).

8113621000 is an abundant number, since it is smaller than the sum of its proper divisors (11194187000).

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

8113621000 is a wasteful number, since it uses less digits than its factorization.

8113621000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137599 (or 137585 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 8113621000 is about 90075.6404362467. The cubic root of 8113621000 is about 2009.4239415836.

Adding to 8113621000 its reverse (1263118), we get a palindrome (8114884118).

The spelling of 8113621000 in words is "eight billion, one hundred thirteen million, six hundred twenty-one thousand".