8391420145896 has 64 divisors (see below), whose sum is σ = 21436738145280. Its totient is φ = 2736114098880.

The previous prime is 8391420145819. The next prime is 8391420145909. The reversal of 8391420145896 is 6985410241938.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11086 + ... + 4096701.

It is an arithmetic number, because the mean of its divisors is an integer number (334949033520).

Almost surely, 2^{8391420145896} 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 8391420145896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10718369072640).

8391420145896 is an abundant number, since it is smaller than the sum of its proper divisors (13045317999384).

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

8391420145896 is a wasteful number, since it uses less digits than its factorization.

8391420145896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4109654 (or 4109650 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 8391420145896 in words is "eight trillion, three hundred ninety-one billion, four hundred twenty million, one hundred forty-five thousand, eight hundred ninety-six".