320649890272 has 48 divisors (see below), whose sum is σ = 655134737040. Its totient is φ = 154301801472.

The previous prime is 320649890269. The next prime is 320649890291. The reversal of 320649890272 is 272098946023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261498 + ... + 842425.

It is an arithmetic number, because the mean of its divisors is an integer number (13648640355).

Almost surely, 2^320649890272 is an apocalyptic number.

320649890272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320649890272 is an abundant number, since it is smaller than the sum of its proper divisors (334484846768).

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

320649890272 is a wasteful number, since it uses less digits than its factorization.

320649890272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104275 (or 1104267 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 320649890272 in words is "three hundred twenty billion, six hundred forty-nine million, eight hundred ninety thousand, two hundred seventy-two".