2115354440140 has 36 divisors (see below), whose sum is σ = 4643782842384. Its totient is φ = 809352999136.

The previous prime is 2115354440081. The next prime is 2115354440179. The reversal of 2115354440140 is 410444535112.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2115354440096 and 2115354440105.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99958912 + ... + 99980071.

It is an arithmetic number, because the mean of its divisors is an integer number (128993967844).

Almost surely, 2^{2115354440140} is an apocalyptic number.

2115354440140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115354440140 is an abundant number, since it is smaller than the sum of its proper divisors (2528428402244).

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

2115354440140 is a wasteful number, since it uses less digits than its factorization.

2115354440140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199939038 (or 199939013 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 2115354440140 its reverse (410444535112), we get a palindrome (2525798975252).

The spelling of 2115354440140 in words is "two trillion, one hundred fifteen billion, three hundred fifty-four million, four hundred forty thousand, one hundred forty".