15780306665356 has 12 divisors (see below), whose sum is σ = 27754308206800. Its totient is φ = 7850504320560.

The previous prime is 15780306665341. The next prime is 15780306665443. The reversal of 15780306665356 is 65356660308751.

It is a junction number, because it is equal to n+sod(n) for n = 15780306665294 and 15780306665303.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9912252135 + ... + 9912253726.

Almost surely, 2^{15780306665356} is an apocalyptic number.

It is an amenable number.

15780306665356 is a deficient number, since it is larger than the sum of its proper divisors (11974001541444).

15780306665356 is a wasteful number, since it uses less digits than its factorization.

15780306665356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19824506064 (or 19824506062 counting only the distinct ones).

The product of its (nonzero) digits is 81648000, while the sum is 61.

The spelling of 15780306665356 in words is "fifteen trillion, seven hundred eighty billion, three hundred six million, six hundred sixty-five thousand, three hundred fifty-six".