320489066880 has 128 divisors (see below), whose sum is σ = 1135065506400. Its totient is φ = 85463746560.

The previous prime is 320489066879. The next prime is 320489066987. The reversal of 320489066880 is 88660984023.

320489066880 is a `hidden beast` number, since 3 + 20 + 489 + 0 + 6 + 68 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×320489066880² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9256131 + ... + 9290690.

Almost surely, 2^320489066880 is an apocalyptic number.

320489066880 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320489066880 is an abundant number, since it is smaller than the sum of its proper divisors (814576439520).

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

320489066880 is a wasteful number, since it uses less digits than its factorization.

320489066880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18546849 (or 18546831 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 320489066880 in words is "three hundred twenty billion, four hundred eighty-nine million, sixty-six thousand, eight hundred eighty".