11552065721 has 32 divisors (see below), whose sum is σ = 14705971200. Its totient is φ = 8846228160.

The previous prime is 11552065691. The next prime is 11552065727. The reversal of 11552065721 is 12756025511.

It is not a de Polignac number, because 11552065721 - 2¹⁰ = 11552064697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11552065727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 190595 + ... + 243783.

It is an arithmetic number, because the mean of its divisors is an integer number (459561600).

Almost surely, 2^11552065721 is an apocalyptic number.

It is an amenable number.

11552065721 is a deficient number, since it is larger than the sum of its proper divisors (3153905479).

11552065721 is a wasteful number, since it uses less digits than its factorization.

11552065721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53309.

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 11552065721 in words is "eleven billion, five hundred fifty-two million, sixty-five thousand, seven hundred twenty-one".