18078016782 has 48 divisors (see below), whose sum is σ = 42686853120. Its totient is φ = 5088050352.

The previous prime is 18078016771. The next prime is 18078016783. The reversal of 18078016782 is 28761087081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18078016783) 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, 439182 + ... + 478577.

It is an arithmetic number, because the mean of its divisors is an integer number (889309440).

Almost surely, 2^18078016782 is an apocalyptic number.

18078016782 is an abundant number, since it is smaller than the sum of its proper divisors (24608836338).

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

18078016782 is a wasteful number, since it uses less digits than its factorization.

18078016782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917845 (or 917838 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 18078016782 in words is "eighteen billion, seventy-eight million, sixteen thousand, seven hundred eighty-two".