11161045663 has 4 divisors (see below), whose sum is σ = 11161258920. Its totient is φ = 11160832408.

The previous prime is 11161045639. The next prime is 11161045673. The reversal of 11161045663 is 36654016111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36654016111 = 6737 ⋅5440703.

It is a cyclic number.

It is not a de Polignac number, because 11161045663 - 2⁵ = 11161045631 is a prime.

It is a super-2 number, since 2×11161045663² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11161045633) 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, 31656 + ... + 152722.

It is an arithmetic number, because the mean of its divisors is an integer number (2790314730).

Almost surely, 2^11161045663 is an apocalyptic number.

11161045663 is a deficient number, since it is larger than the sum of its proper divisors (213257).

11161045663 is an equidigital number, since it uses as much as digits as its factorization.

11161045663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213256.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 11161045663 in words is "eleven billion, one hundred sixty-one million, forty-five thousand, six hundred sixty-three".