355660020647 has 16 divisors (see below), whose sum is σ = 371866723200. Its totient is φ = 339719009280.

The previous prime is 355660020629. The next prime is 355660020649. The reversal of 355660020647 is 746020066553.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 355660020647 - 2¹⁴ = 355660004263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 355660020598 and 355660020607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (355660020649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7348754 + ... + 7396992.

It is an arithmetic number, because the mean of its divisors is an integer number (23241670200).

Almost surely, 2^355660020647 is an apocalyptic number.

355660020647 is a deficient number, since it is larger than the sum of its proper divisors (16206702553).

355660020647 is a wasteful number, since it uses less digits than its factorization.

355660020647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50986.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 355660020647 in words is "three hundred fifty-five billion, six hundred sixty million, twenty thousand, six hundred forty-seven".