11610731721 has 8 divisors (see below), whose sum is σ = 15488681824. Its totient is φ = 7736634720.

The previous prime is 11610731659. The next prime is 11610731749. The reversal of 11610731721 is 12713701611.

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

It is not a de Polignac number, because 11610731721 - 2⁷ = 11610731593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11610731761) 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, 956236 + ... + 968301.

It is an arithmetic number, because the mean of its divisors is an integer number (1936085228).

Almost surely, 2^11610731721 is an apocalyptic number.

It is an amenable number.

11610731721 is a deficient number, since it is larger than the sum of its proper divisors (3877950103).

11610731721 is a wasteful number, since it uses less digits than its factorization.

11610731721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926551.

The product of its (nonzero) digits is 1764, while the sum is 30.

The spelling of 11610731721 in words is "eleven billion, six hundred ten million, seven hundred thirty-one thousand, seven hundred twenty-one".