11553564218387 has 12 divisors (see below), whose sum is σ = 12407910862248. Its totient is φ = 10720788590400.

The previous prime is 11553564218293. The next prime is 11553564218407. The reversal of 11553564218387 is 78381246535511.

It is a happy number.

It is not a de Polignac number, because 11553564218387 - 2¹⁸ = 11553563956243 is a prime.

It is a super-2 number, since 2×11553564218387² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11553564218087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67323689 + ... + 67495082.

It is an arithmetic number, because the mean of its divisors is an integer number (1033992571854).

Almost surely, 2^{11553564218387} is an apocalyptic number.

11553564218387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11553564218387 is a deficient number, since it is larger than the sum of its proper divisors (854346643861).

11553564218387 is an equidigital number, since it uses as much as digits as its factorization.

11553564218387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134818930 (or 134818859 counting only the distinct ones).

The product of its digits is 24192000, while the sum is 59.

The spelling of 11553564218387 in words is "eleven trillion, five hundred fifty-three billion, five hundred sixty-four million, two hundred eighteen thousand, three hundred eighty-seven".