8245646340840 has 512 divisors, whose sum is σ = 29882880000000. Its totient is φ = 2014732984320.

The previous prime is 8245646340791. The next prime is 8245646340887. The reversal of 8245646340840 is 480436465428.

It is a happy number.

8245646340840 is a `hidden beast` number, since 8 + 2 + 4 + 564 + 6 + 34 + 0 + 8 + 40 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1649456661 + ... + 1649461659.

It is an arithmetic number, because the mean of its divisors is an integer number (58365000000).

Almost surely, 2^{8245646340840} 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 8245646340840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14941440000000).

8245646340840 is an abundant number, since it is smaller than the sum of its proper divisors (21637233659160).

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

8245646340840 is a wasteful number, since it uses less digits than its factorization.

8245646340840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662 (or 7652 counting only the distinct ones).

The product of its (nonzero) digits is 17694720, while the sum is 54.

The spelling of 8245646340840 in words is "eight trillion, two hundred forty-five billion, six hundred forty-six million, three hundred forty thousand, eight hundred forty".