2111634236440 has 32 divisors (see below), whose sum is σ = 4794765822000. Its totient is φ = 836904576384.

The previous prime is 2111634236431. The next prime is 2111634236443. The reversal of 2111634236440 is 446324361112.

It is a self number, because there is not a number n which added to its sum of digits gives 2111634236440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111634236443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242155530 + ... + 242164249.

Almost surely, 2^{2111634236440} is an apocalyptic number.

2111634236440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111634236440 is an abundant number, since it is smaller than the sum of its proper divisors (2683131585560).

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

2111634236440 is a wasteful number, since it uses less digits than its factorization.

2111634236440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484319899 (or 484319895 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

Adding to 2111634236440 its reverse (446324361112), we get a palindrome (2557958597552).

The spelling of 2111634236440 in words is "two trillion, one hundred eleven billion, six hundred thirty-four million, two hundred thirty-six thousand, four hundred forty".