320640670800 has 150 divisors (see below), whose sum is σ = 1150753753358. Its totient is φ = 85504170240.

The previous prime is 320640670799. The next prime is 320640670817. The reversal of 320640670800 is 8076046023.

320640670800 is a `hidden beast` number, since 3 + 2 + 0 + 640 + 6 + 7 + 0 + 8 + 0 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 8190974016 + 312449696784 = 90504^2 + 558972^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4915759 + ... + 4980558.

Almost surely, 2^320640670800 is an apocalyptic number.

320640670800 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320640670800 is an abundant number, since it is smaller than the sum of its proper divisors (830113082558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320640670800 is a wasteful number, since it uses less digits than its factorization.

320640670800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896347 (or 9896327 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 320640670800 in words is "three hundred twenty billion, six hundred forty million, six hundred seventy thousand, eight hundred".