8791340220040 has 256 divisors, whose sum is σ = 24746342400000. Its totient is φ = 2744493480960.

The previous prime is 8791340220029. The next prime is 8791340220049. The reversal of 8791340220040 is 400220431978.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 8791340219975 and 8791340220002.

It is not an unprimeable number, because it can be changed into a prime (8791340220049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12928461 + ... + 13591459.

It is an arithmetic number, because the mean of its divisors is an integer number (96665400000).

Almost surely, 2^{8791340220040} 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 8791340220040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12373171200000).

8791340220040 is an abundant number, since it is smaller than the sum of its proper divisors (15955002179960).

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

8791340220040 is a wasteful number, since it uses less digits than its factorization.

8791340220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663140 (or 663136 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 8791340220040 in words is "eight trillion, seven hundred ninety-one billion, three hundred forty million, two hundred twenty thousand, forty".