18078861782 has 8 divisors (see below), whose sum is σ = 27851219616. Its totient is φ = 8795121912.

The previous prime is 18078861761. The next prime is 18078861797. The reversal of 18078861782 is 28716887081.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122154398 + ... + 122154545.

It is an arithmetic number, because the mean of its divisors is an integer number (3481402452).

Almost surely, 2^18078861782 is an apocalyptic number.

18078861782 is a deficient number, since it is larger than the sum of its proper divisors (9772357834).

18078861782 is a wasteful number, since it uses less digits than its factorization.

18078861782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244308982.

The product of its (nonzero) digits is 2408448, while the sum is 56.

The spelling of 18078861782 in words is "eighteen billion, seventy-eight million, eight hundred sixty-one thousand, seven hundred eighty-two".