320994387693 has 48 divisors (see below), whose sum is σ = 542252430720. Its totient is φ = 179178210432.

The previous prime is 320994387673. The next prime is 320994387731. The reversal of 320994387693 is 396783499023.

320994387693 is a `hidden beast` number, since 3 + 20 + 99 + 438 + 7 + 6 + 93 = 666.

It is not a de Polignac number, because 320994387693 - 2⁵ = 320994387661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 320994387693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320994387673) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 554730 + ... + 974532.

It is an arithmetic number, because the mean of its divisors is an integer number (11296925640).

Almost surely, 2^320994387693 is an apocalyptic number.

It is an amenable number.

320994387693 is a deficient number, since it is larger than the sum of its proper divisors (221258043027).

320994387693 is a wasteful number, since it uses less digits than its factorization.

320994387693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420098 (or 420095 counting only the distinct ones).

The product of its (nonzero) digits is 52907904, while the sum is 63.

The spelling of 320994387693 in words is "three hundred twenty billion, nine hundred ninety-four million, three hundred eighty-seven thousand, six hundred ninety-three".