11720011626181 has 16 divisors (see below), whose sum is σ = 11792218733568. Its totient is φ = 11647988352000.

The previous prime is 11720011626151. The next prime is 11720011626221. The reversal of 11720011626181 is 18162611002711.

It is a cyclic number.

It is not a de Polignac number, because 11720011626181 - 2¹¹ = 11720011624133 is a prime.

It is a super-2 number, since 2×11720011626181² (a number of 27 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 11720011626181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11720011626151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 990612936 + ... + 990624766.

It is an arithmetic number, because the mean of its divisors is an integer number (737013670848).

Almost surely, 2^{11720011626181} is an apocalyptic number.

It is an amenable number.

11720011626181 is a deficient number, since it is larger than the sum of its proper divisors (72207107387).

11720011626181 is a wasteful number, since it uses less digits than its factorization.

11720011626181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19092.

The product of its (nonzero) digits is 8064, while the sum is 37.

Adding to 11720011626181 its reverse (18162611002711), we get a palindrome (29882622628892).

The spelling of 11720011626181 in words is "eleven trillion, seven hundred twenty billion, eleven million, six hundred twenty-six thousand, one hundred eighty-one".