16818878790 has 48 divisors (see below), whose sum is σ = 49976098848. Its totient is φ = 3844315008.

The previous prime is 16818878789. The next prime is 16818878801. The reversal of 16818878790 is 9787881861.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13347687 + ... + 13348946.

It is an arithmetic number, because the mean of its divisors is an integer number (1041168726).

Almost surely, 2^16818878790 is an apocalyptic number.

16818878790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16818878790 is an abundant number, since it is smaller than the sum of its proper divisors (33157220058).

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

16818878790 is a wasteful number, since it uses less digits than its factorization.

16818878790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26696653 (or 26696650 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 63.

The spelling of 16818878790 in words is "sixteen billion, eight hundred eighteen million, eight hundred seventy-eight thousand, seven hundred ninety".