16635669780 has 48 divisors (see below), whose sum is σ = 46588316544. Its totient is φ = 4435374720.

The previous prime is 16635669749. The next prime is 16635669781. The reversal of 16635669780 is 8796653661.

16635669780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 16635669780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16635669781) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 356694 + ... + 400626.

It is an arithmetic number, because the mean of its divisors is an integer number (970589928).

Almost surely, 2^16635669780 is an apocalyptic number.

16635669780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16635669780 is an abundant number, since it is smaller than the sum of its proper divisors (29952646764).

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

16635669780 is a wasteful number, since it uses less digits than its factorization.

16635669780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50256 (or 50254 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 16635669780 in words is "sixteen billion, six hundred thirty-five million, six hundred sixty-nine thousand, seven hundred eighty".