11722661061 has 4 divisors (see below), whose sum is σ = 15630214752. Its totient is φ = 7815107372.

The previous prime is 11722661057. The next prime is 11722661063. The reversal of 11722661061 is 16016622711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16016622711 = 3 ⋅5338874237.

It is a cyclic number.

It is not a de Polignac number, because 11722661061 - 2² = 11722661057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11722661063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1953776841 + ... + 1953776846.

It is an arithmetic number, because the mean of its divisors is an integer number (3907553688).

Almost surely, 2^11722661061 is an apocalyptic number.

It is an amenable number.

11722661061 is a deficient number, since it is larger than the sum of its proper divisors (3907553691).

11722661061 is an equidigital number, since it uses as much as digits as its factorization.

11722661061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907553690.

The product of its (nonzero) digits is 6048, while the sum is 33.

The spelling of 11722661061 in words is "eleven billion, seven hundred twenty-two million, six hundred sixty-one thousand, sixty-one".