2115805108512 has 96 divisors (see below), whose sum is σ = 5662259733312. Its totient is φ = 691535995904.

The previous prime is 2115805108507. The next prime is 2115805108519. The reversal of 2115805108512 is 2158015085112.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (2115805108519) 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, 8202043 + ... + 8456069.

It is an arithmetic number, because the mean of its divisors is an integer number (58981872222).

Almost surely, 2^{2115805108512} 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 2115805108512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2831129866656).

2115805108512 is an abundant number, since it is smaller than the sum of its proper divisors (3546454624800).

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

2115805108512 is a wasteful number, since it uses less digits than its factorization.

2115805108512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255730 (or 255722 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 39.

The spelling of 2115805108512 in words is "two trillion, one hundred fifteen billion, eight hundred five million, one hundred eight thousand, five hundred twelve".