8158809780 has 576 divisors, whose sum is σ = 29923084800. Its totient is φ = 1839974400.

The previous prime is 8158809773. The next prime is 8158809781. The reversal of 8158809780 is 879088518.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8158809781) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 91671976 + ... + 91672064.

It is an arithmetic number, because the mean of its divisors is an integer number (51949800).

Almost surely, 2^8158809780 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 8158809780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14961542400).

8158809780 is an abundant number, since it is smaller than the sum of its proper divisors (21764275020).

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

8158809780 is a wasteful number, since it uses less digits than its factorization.

8158809780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 54.

The square root of 8158809780 is about 90326.1301064094. The cubic root of 8158809780 is about 2013.1475301710.

The spelling of 8158809780 in words is "eight billion, one hundred fifty-eight million, eight hundred nine thousand, seven hundred eighty".