11061165605991 has 4 divisors (see below), whose sum is σ = 14748220807992. Its totient is φ = 7374110403992.

The previous prime is 11061165605929. The next prime is 11061165606013. The reversal of 11061165605991 is 19950656116011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11061165605991 - 2⁷ = 11061165605863 is a prime.

It is a super-3 number, since 3×11061165605991³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11061165605291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843527600996 + ... + 1843527601001.

It is an arithmetic number, because the mean of its divisors is an integer number (3687055201998).

Almost surely, 2^{11061165605991} is an apocalyptic number.

11061165605991 is a deficient number, since it is larger than the sum of its proper divisors (3687055202001).

11061165605991 is an equidigital number, since it uses as much as digits as its factorization.

11061165605991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3687055202000.

The product of its (nonzero) digits is 437400, while the sum is 51.

The spelling of 11061165605991 in words is "eleven trillion, sixty-one billion, one hundred sixty-five million, six hundred five thousand, nine hundred ninety-one".