11385434865 has 64 divisors (see below), whose sum is σ = 21756911616. Its totient is φ = 4975471872.

The previous prime is 11385434843. The next prime is 11385434867. The reversal of 11385434865 is 56843458311.

It is not a de Polignac number, because 11385434865 - 2⁵ = 11385434833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11385434867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 185379 + ... + 239031.

It is an arithmetic number, because the mean of its divisors is an integer number (339951744).

Almost surely, 2^11385434865 is an apocalyptic number.

11385434865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11385434865 is a deficient number, since it is larger than the sum of its proper divisors (10371476751).

11385434865 is a wasteful number, since it uses less digits than its factorization.

11385434865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53758.

The product of its digits is 1382400, while the sum is 48.

The spelling of 11385434865 in words is "eleven billion, three hundred eighty-five million, four hundred thirty-four thousand, eight hundred sixty-five".