2118635989440 has 56 divisors (see below), whose sum is σ = 6726669269520. Its totient is φ = 564969596928.

The previous prime is 2118635989427. The next prime is 2118635989489. The reversal of 2118635989440 is 449895368112.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103455285 + ... + 1103457204.

Almost surely, 2^{2118635989440} is an apocalyptic number.

2118635989440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2118635989440 is an abundant number, since it is smaller than the sum of its proper divisors (4608033280080).

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

2118635989440 is a wasteful number, since it uses less digits than its factorization.

2118635989440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2206912509 (or 2206912499 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 60.

The spelling of 2118635989440 in words is "two trillion, one hundred eighteen billion, six hundred thirty-five million, nine hundred eighty-nine thousand, four hundred forty".