3909658386243 has 16 divisors (see below), whose sum is σ = 5301328838400. Its totient is φ = 2562215048160.

The previous prime is 3909658386203. The next prime is 3909658386251. The reversal of 3909658386243 is 3426838569093.

It is not a de Polignac number, because 3909658386243 - 2¹⁰ = 3909658385219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3909658386203) 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, 11340298 + ... + 11679968.

It is an arithmetic number, because the mean of its divisors is an integer number (331333052400).

Almost surely, 2^{3909658386243} is an apocalyptic number.

3909658386243 is a deficient number, since it is larger than the sum of its proper divisors (1391670452157).

3909658386243 is a wasteful number, since it uses less digits than its factorization.

3909658386243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404762.

The product of its (nonzero) digits is 201553920, while the sum is 66.

The spelling of 3909658386243 in words is "three trillion, nine hundred nine billion, six hundred fifty-eight million, three hundred eighty-six thousand, two hundred forty-three".