11972719655 has 12 divisors (see below), whose sum is σ = 15557452200. Its totient is φ = 8841392352.

The previous prime is 11972719651. The next prime is 11972719669. The reversal of 11972719655 is 55691727911.

It is not a de Polignac number, because 11972719655 - 2² = 11972719651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11972719597 and 11972719606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11972719651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7083605 + ... + 7085294.

It is an arithmetic number, because the mean of its divisors is an integer number (1296454350).

Almost surely, 2^11972719655 is an apocalyptic number.

11972719655 is a deficient number, since it is larger than the sum of its proper divisors (3584732545).

11972719655 is a wasteful number, since it uses less digits than its factorization.

11972719655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14168930 (or 14168917 counting only the distinct ones).

The product of its digits is 1190700, while the sum is 53.

The spelling of 11972719655 in words is "eleven billion, nine hundred seventy-two million, seven hundred nineteen thousand, six hundred fifty-five".