11723537772 has 18 divisors (see below), whose sum is σ = 29634498348. Its totient is φ = 3907845912.

The previous prime is 11723537753. The next prime is 11723537783. The reversal of 11723537772 is 27773532711.

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162826878 + ... + 162826949.

Almost surely, 2^11723537772 is an apocalyptic number.

11723537772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11723537772 is an abundant number, since it is smaller than the sum of its proper divisors (17910960576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11723537772 is a wasteful number, since it uses less digits than its factorization.

11723537772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325653837 (or 325653832 counting only the distinct ones).

The product of its digits is 432180, while the sum is 45.

The spelling of 11723537772 in words is "eleven billion, seven hundred twenty-three million, five hundred thirty-seven thousand, seven hundred seventy-two".