2115510434540 has 48 divisors (see below), whose sum is σ = 4518108957600. Its totient is φ = 831817684992.

The previous prime is 2115510434519. The next prime is 2115510434591. The reversal of 2115510434540 is 454340155112.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2115510434540.

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, 30665606 + ... + 30734514.

It is an arithmetic number, because the mean of its divisors is an integer number (94127269950).

Almost surely, 2^{2115510434540} is an apocalyptic number.

2115510434540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115510434540 is an abundant number, since it is smaller than the sum of its proper divisors (2402598523060).

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

2115510434540 is a wasteful number, since it uses less digits than its factorization.

2115510434540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94994 (or 94992 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 35.

Adding to 2115510434540 its reverse (454340155112), we get a palindrome (2569850589652).

The spelling of 2115510434540 in words is "two trillion, one hundred fifteen billion, five hundred ten million, four hundred thirty-four thousand, five hundred forty".