12665423350472 has 8 divisors (see below), whose sum is σ = 23747668782150. Its totient is φ = 6332711675232.

The previous prime is 12665423350469. The next prime is 12665423350499. The reversal of 12665423350472 is 27405332456621.

It can be written as a sum of positive squares in only one way, i.e., 7959361282756 + 4706062067716 = 2821234^2 + 2169346^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 12665423350472.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791588959397 + ... + 791588959412.

Almost surely, 2^{12665423350472} is an apocalyptic number.

It is an amenable number.

12665423350472 is a deficient number, since it is larger than the sum of its proper divisors (11082245431678).

12665423350472 is a wasteful number, since it uses less digits than its factorization.

12665423350472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583177918815 (or 1583177918811 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 50.

The spelling of 12665423350472 in words is "twelve trillion, six hundred sixty-five billion, four hundred twenty-three million, three hundred fifty thousand, four hundred seventy-two".