2305666038172 has 36 divisors (see below), whose sum is σ = 4764883252080. Its totient is φ = 956267009280.

The previous prime is 2305666038139. The next prime is 2305666038229. The reversal of 2305666038172 is 2718306665032.

2305666038172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2305666038172² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42816597 + ... + 42870412.

Almost surely, 2^{2305666038172} is an apocalyptic number.

It is an amenable number.

2305666038172 is an abundant number, since it is smaller than the sum of its proper divisors (2459217213908).

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

2305666038172 is a wasteful number, since it uses less digits than its factorization.

2305666038172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85687082 (or 85687049 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 49.

The spelling of 2305666038172 in words is "two trillion, three hundred five billion, six hundred sixty-six million, thirty-eight thousand, one hundred seventy-two".