3998564902393 has 8 divisors (see below), whose sum is σ = 4091593371008. Its totient is φ = 3905538187824.

The previous prime is 3998564902309. The next prime is 3998564902427. The reversal of 3998564902393 is 3932094658993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3998564902393 - 2¹⁷ = 3998564771321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998564905393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4929280 + ... + 5682862.

It is an arithmetic number, because the mean of its divisors is an integer number (511449171376).

Almost surely, 2^{3998564902393} is an apocalyptic number.

It is an amenable number.

3998564902393 is a deficient number, since it is larger than the sum of its proper divisors (93028468615).

3998564902393 is a wasteful number, since it uses less digits than its factorization.

3998564902393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877023.

The product of its (nonzero) digits is 340122240, while the sum is 70.

The spelling of 3998564902393 in words is "three trillion, nine hundred ninety-eight billion, five hundred sixty-four million, nine hundred two thousand, three hundred ninety-three".