11723015884321 has 9 divisors (see below), whose sum is σ = 13637005541649. Its totient is φ = 10048278786084.

The previous prime is 11723015884319. The next prime is 11723015884369. The reversal of 11723015884321 is 12348851032711.

The square root of 11723015884321 is 3423889.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 11723015884321 - 2¹ = 11723015884319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11723015884381) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 23722660 + ... + 24211786.

It is an arithmetic number, because the mean of its divisors is an integer number (1515222837961).

Almost surely, 2^{11723015884321} is an apocalyptic number.

11723015884321 is the 3423889-th square number.

11723015884321 is the 1711945-th centered octagonal number.

It is an amenable number.

11723015884321 is a deficient number, since it is larger than the sum of its proper divisors (1913989657328).

11723015884321 is an frugal number, since it uses more digits than its factorization.

11723015884321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978268 (or 489134 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 11723015884321 in words is "eleven trillion, seven hundred twenty-three billion, fifteen million, eight hundred eighty-four thousand, three hundred twenty-one".