11854265815 has 16 divisors (see below), whose sum is σ = 16297047360. Its totient is φ = 8108755200.

The previous prime is 11854265783. The next prime is 11854265827. The reversal of 11854265815 is 51856245811.

It is a happy number.

It is not a de Polignac number, because 11854265815 - 2⁵ = 11854265783 is a prime.

It is a super-2 number, since 2×11854265815² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 399736 + ... + 428365.

It is an arithmetic number, because the mean of its divisors is an integer number (1018565460).

Almost surely, 2^11854265815 is an apocalyptic number.

11854265815 is a deficient number, since it is larger than the sum of its proper divisors (4442781545).

11854265815 is an equidigital number, since it uses as much as digits as its factorization.

11854265815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828522.

The product of its digits is 384000, while the sum is 46.

The spelling of 11854265815 in words is "eleven billion, eight hundred fifty-four million, two hundred sixty-five thousand, eight hundred fifteen".