11722611511 has 16 divisors (see below), whose sum is σ = 13397245344. Its totient is φ = 10161275904.

The previous prime is 11722611493. The next prime is 11722611541. The reversal of 11722611511 is 11511622711.

It is not a de Polignac number, because 11722611511 - 2⁵ = 11722611479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11722611511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722611541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38035 + ... + 157771.

It is an arithmetic number, because the mean of its divisors is an integer number (837327834).

Almost surely, 2^11722611511 is an apocalyptic number.

11722611511 is a deficient number, since it is larger than the sum of its proper divisors (1674633833).

11722611511 is a wasteful number, since it uses less digits than its factorization.

11722611511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120210.

The product of its digits is 840, while the sum is 28.

The spelling of 11722611511 in words is "eleven billion, seven hundred twenty-two million, six hundred eleven thousand, five hundred eleven".