11172030661 has 8 divisors (see below), whose sum is σ = 12212100000. Its totient is φ = 10136033040.

The previous prime is 11172030659. The next prime is 11172030671. The reversal of 11172030661 is 16603027111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11172030661 - 2¹ = 11172030659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11172030671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1012186 + ... + 1023163.

It is an arithmetic number, because the mean of its divisors is an integer number (1526512500).

Almost surely, 2^11172030661 is an apocalyptic number.

11172030661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11172030661 is a deficient number, since it is larger than the sum of its proper divisors (1040069339).

11172030661 is a wasteful number, since it uses less digits than its factorization.

11172030661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035859.

The product of its (nonzero) digits is 1512, while the sum is 28.

Adding to 11172030661 its reverse (16603027111), we get a palindrome (27775057772).

The spelling of 11172030661 in words is "eleven billion, one hundred seventy-two million, thirty thousand, six hundred sixty-one".