3985398806266 has 16 divisors (see below), whose sum is σ = 6329935817856. Its totient is φ = 1875427043776.

The previous prime is 3985398806243. The next prime is 3985398806297. The reversal of 3985398806266 is 6626088935893.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516916 + ... + 2870191.

It is an arithmetic number, because the mean of its divisors is an integer number (395620988616).

Almost surely, 2^{3985398806266} is an apocalyptic number.

3985398806266 is a deficient number, since it is larger than the sum of its proper divisors (2344537011590).

3985398806266 is a wasteful number, since it uses less digits than its factorization.

3985398806266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421733.

The product of its (nonzero) digits is 806215680, while the sum is 73.

The spelling of 3985398806266 in words is "three trillion, nine hundred eighty-five billion, three hundred ninety-eight million, eight hundred six thousand, two hundred sixty-six".