320271947645 has 16 divisors (see below), whose sum is σ = 425076118320. Its totient is φ = 230116391424.

The previous prime is 320271947621. The next prime is 320271947657. The reversal of 320271947645 is 546749172023.

It can be written as a sum of positive squares in 8 ways, for example, as 14721696889 + 305550250756 = 121333^2 + 552766^2 .

It is a cyclic number.

It is not a de Polignac number, because 320271947645 - 2⁶ = 320271947581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320271947593 and 320271947602.

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, 66582200 + ... + 66587009.

It is an arithmetic number, because the mean of its divisors is an integer number (26567257395).

Almost surely, 2^320271947645 is an apocalyptic number.

It is an amenable number.

320271947645 is a deficient number, since it is larger than the sum of its proper divisors (104804170675).

320271947645 is a wasteful number, since it uses less digits than its factorization.

320271947645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133169264.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 320271947645 in words is "three hundred twenty billion, two hundred seventy-one million, nine hundred forty-seven thousand, six hundred forty-five".