11663513421105 has 96 divisors (see below), whose sum is σ = 23381676912384. Its totient is φ = 4921034356224.

The previous prime is 11663513421031. The next prime is 11663513421169. The reversal of 11663513421105 is 50112431536611.

11663513421105 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 11663513421105 - 2²³ = 11663505032497 is a prime.

It is a super-2 number, since 2×11663513421105² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 68778199 + ... + 68947571.

It is an arithmetic number, because the mean of its divisors is an integer number (243559134504).

Almost surely, 2^{11663513421105} is an apocalyptic number.

11663513421105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11663513421105 is an abundant number, since it is smaller than the sum of its proper divisors (11718163491279).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11663513421105 is a wasteful number, since it uses less digits than its factorization.

11663513421105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176615 (or 176608 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

Adding to 11663513421105 its reverse (50112431536611), we get a palindrome (61775944957716).

The spelling of 11663513421105 in words is "eleven trillion, six hundred sixty-three billion, five hundred thirteen million, four hundred twenty-one thousand, one hundred five".