7861909228160 has 128 divisors (see below), whose sum is σ = 20242471656960. Its totient is φ = 2902595604480.

The previous prime is 7861909228139. The next prime is 7861909228169. The reversal of 7861909228160 is 618229091687.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 7861909228160.

It is not an unprimeable number, because it can be changed into a prime (7861909228169) 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, 108148625 + ... + 108221295.

It is an arithmetic number, because the mean of its divisors is an integer number (158144309820).

Almost surely, 2^{7861909228160} 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 7861909228160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10121235828480).

7861909228160 is an abundant number, since it is smaller than the sum of its proper divisors (12380562428800).

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

7861909228160 is a wasteful number, since it uses less digits than its factorization.

7861909228160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85706 (or 85694 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 7861909228160 in words is "seven trillion, eight hundred sixty-one billion, nine hundred nine million, two hundred twenty-eight thousand, one hundred sixty".