14809785661 has 4 divisors (see below), whose sum is σ = 16156129824. Its totient is φ = 13463441500.

The previous prime is 14809785647. The next prime is 14809785667. The reversal of 14809785661 is 16658790841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14809785661 - 2¹⁹ = 14809261373 is a prime.

It is a super-2 number, since 2×14809785661² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14809785667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 673172065 + ... + 673172086.

It is an arithmetic number, because the mean of its divisors is an integer number (4039032456).

Almost surely, 2^14809785661 is an apocalyptic number.

14809785661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14809785661 is a deficient number, since it is larger than the sum of its proper divisors (1346344163).

14809785661 is a wasteful number, since it uses less digits than its factorization.

14809785661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346344162.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The spelling of 14809785661 in words is "fourteen billion, eight hundred nine million, seven hundred eighty-five thousand, six hundred sixty-one".