11687800305 has 16 divisors (see below), whose sum is σ = 19800509184. Its totient is φ = 5866817280.

The previous prime is 11687800303. The next prime is 11687800331. The reversal of 11687800305 is 50300878611.

It is not a de Polignac number, because 11687800305 - 2¹ = 11687800303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11687800303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22917001 + ... + 22917510.

It is an arithmetic number, because the mean of its divisors is an integer number (1237531824).

Almost surely, 2^11687800305 is an apocalyptic number.

11687800305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11687800305 is a deficient number, since it is larger than the sum of its proper divisors (8112708879).

11687800305 is a wasteful number, since it uses less digits than its factorization.

11687800305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45834536.

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 11687800305 in words is "eleven billion, six hundred eighty-seven million, eight hundred thousand, three hundred five".