11661730989 has 8 divisors (see below), whose sum is σ = 15736312032. Its totient is φ = 7680818640.

The previous prime is 11661730981. The next prime is 11661731041. The reversal of 11661730989 is 98903716611.

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

It is not a de Polignac number, because 11661730989 - 2³ = 11661730981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661730981) 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, 23416882 + ... + 23417379.

It is an arithmetic number, because the mean of its divisors is an integer number (1967039004).

Almost surely, 2^11661730989 is an apocalyptic number.

It is an amenable number.

11661730989 is a deficient number, since it is larger than the sum of its proper divisors (4074581043).

11661730989 is an equidigital number, since it uses as much as digits as its factorization.

11661730989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46834347.

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 11661730989 in words is "eleven billion, six hundred sixty-one million, seven hundred thirty thousand, nine hundred eighty-nine".