11864855539 has 8 divisors (see below), whose sum is σ = 12779771840. Its totient is φ = 10978984296.

The previous prime is 11864855531. The next prime is 11864855549. The reversal of 11864855539 is 93555846811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11864855539 - 2³ = 11864855531 is a prime.

It is a super-2 number, since 2×11864855539² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11864855539.

It is not an unprimeable number, because it can be changed into a prime (11864855531) 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 7 ways as a sum of consecutive naturals, for example, 7260417 + ... + 7262050.

It is an arithmetic number, because the mean of its divisors is an integer number (1597471480).

Almost surely, 2^11864855539 is an apocalyptic number.

11864855539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11864855539 is a deficient number, since it is larger than the sum of its proper divisors (914916301).

11864855539 is a wasteful number, since it uses less digits than its factorization.

11864855539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14522529.

The product of its digits is 5184000, while the sum is 55.

The spelling of 11864855539 in words is "eleven billion, eight hundred sixty-four million, eight hundred fifty-five thousand, five hundred thirty-nine".