2115405664060 has 96 divisors (see below), whose sum is σ = 4798920595392. Its totient is φ = 778651729920.

The previous prime is 2115405664019. The next prime is 2115405664067. The reversal of 2115405664060 is 604665045112.

It is a super-2 number, since 2×2115405664060² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115405664067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138190927 + ... + 138206233.

It is an arithmetic number, because the mean of its divisors is an integer number (49988756202).

Almost surely, 2^{2115405664060} is an apocalyptic number.

2115405664060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115405664060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2399460297696).

2115405664060 is an abundant number, since it is smaller than the sum of its proper divisors (2683514931332).

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

2115405664060 is a wasteful number, since it uses less digits than its factorization.

2115405664060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16943 (or 16941 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 2115405664060 in words is "two trillion, one hundred fifteen billion, four hundred five million, six hundred sixty-four thousand, sixty".