320661517272 has 64 divisors (see below), whose sum is σ = 827620761600. Its totient is φ = 103425803520.

The previous prime is 320661517261. The next prime is 320661517273. The reversal of 320661517272 is 272715166023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320661517273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6863929 + ... + 6910487.

It is an arithmetic number, because the mean of its divisors is an integer number (12931574400).

Almost surely, 2^320661517272 is an apocalyptic number.

It is an amenable number.

320661517272 is an abundant number, since it is smaller than the sum of its proper divisors (506959244328).

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

320661517272 is a wasteful number, since it uses less digits than its factorization.

320661517272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55856 (or 55852 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 320661517272 in words is "three hundred twenty billion, six hundred sixty-one million, five hundred seventeen thousand, two hundred seventy-two".