11891353785 has 32 divisors (see below), whose sum is σ = 19119058560. Its totient is φ = 6311155200.

The previous prime is 11891353759. The next prime is 11891353819. The reversal of 11891353785 is 58735319811.

It is a happy number.

11891353785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11891353785 - 2¹⁰ = 11891352761 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 4470786 + ... + 4473444.

It is an arithmetic number, because the mean of its divisors is an integer number (597470580).

Almost surely, 2^11891353785 is an apocalyptic number.

11891353785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11891353785 is a deficient number, since it is larger than the sum of its proper divisors (7227704775).

11891353785 is a wasteful number, since it uses less digits than its factorization.

11891353785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4009.

The product of its digits is 907200, while the sum is 51.

The spelling of 11891353785 in words is "eleven billion, eight hundred ninety-one million, three hundred fifty-three thousand, seven hundred eighty-five".