11478117115969 has 9 divisors (see below), whose sum is σ = 13352123008161. Its totient is φ = 9838365771780.

The previous prime is 11478117115967. The next prime is 11478117116009. The reversal of 11478117115969 is 96951171187411.

The square root of 11478117115969 is 3387937.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 11478117115969 - 2¹ = 11478117115967 is a prime.

It is a super-2 number, since 2×11478117115969² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11478117115967) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23473564 + ... + 23957554.

It is an arithmetic number, because the mean of its divisors is an integer number (1483569223129).

Almost surely, 2^{11478117115969} is an apocalyptic number.

11478117115969 is the 3387937-th square number.

11478117115969 is the 1693969-th centered octagonal number.

It is an amenable number.

11478117115969 is a deficient number, since it is larger than the sum of its proper divisors (1874005892192).

11478117115969 is an frugal number, since it uses more digits than its factorization.

11478117115969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967996 (or 483998 counting only the distinct ones).

The product of its digits is 3810240, while the sum is 61.

The spelling of 11478117115969 in words is "eleven trillion, four hundred seventy-eight billion, one hundred seventeen million, one hundred fifteen thousand, nine hundred sixty-nine".