11817801117 has 12 divisors (see below), whose sum is σ = 17113160220. Its totient is φ = 7858686528.

The previous prime is 11817801103. The next prime is 11817801157. The reversal of 11817801117 is 71110871811.

It can be written as a sum of positive squares in 2 ways, for example, as 8976804516 + 2840996601 = 94746^2 + 53301^2 .

It is not a de Polignac number, because 11817801117 - 2⁶ = 11817801053 is a prime.

It is a super-3 number, since 3×11817801117³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11817801157) 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, 1650192 + ... + 1657337.

It is an arithmetic number, because the mean of its divisors is an integer number (1426096685).

Almost surely, 2^11817801117 is an apocalyptic number.

It is an amenable number.

11817801117 is a deficient number, since it is larger than the sum of its proper divisors (5295359103).

11817801117 is a wasteful number, since it uses less digits than its factorization.

11817801117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307932 (or 3307929 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 36.

The spelling of 11817801117 in words is "eleven billion, eight hundred seventeen million, eight hundred one thousand, one hundred seventeen".