18618043787622 has 48 divisors (see below), whose sum is σ = 42617972629440. Its totient is φ = 5864524423296.

The previous prime is 18618043787621. The next prime is 18618043787699. The reversal of 18618043787622 is 22678734081681.

It is a happy number.

18618043787622 is a `hidden beast` number, since 1 + 8 + 61 + 8 + 0 + 437 + 87 + 62 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 18618043787622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18618043787621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 379408983 + ... + 379458050.

It is an arithmetic number, because the mean of its divisors is an integer number (887874429780).

Almost surely, 2^{18618043787622} is an apocalyptic number.

18618043787622 is an abundant number, since it is smaller than the sum of its proper divisors (23999928841818).

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

18618043787622 is a wasteful number, since it uses less digits than its factorization.

18618043787622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 758867117 (or 758867114 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 18618043787622 in words is "eighteen trillion, six hundred eighteen billion, forty-three million, seven hundred eighty-seven thousand, six hundred twenty-two".