320552530781 has 64 divisors (see below), whose sum is σ = 388579415040. Its totient is φ = 258742978560.

The previous prime is 320552530759. The next prime is 320552530787. The reversal of 320552530781 is 187035255023.

It is a cyclic number.

It is not a de Polignac number, because 320552530781 - 2³⁸ = 45674623837 is a prime.

It is a super-2 number, since 2×320552530781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320552530787) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 389492336 + ... + 389493158.

It is an arithmetic number, because the mean of its divisors is an integer number (6071553360).

Almost surely, 2^320552530781 is an apocalyptic number.

It is an amenable number.

320552530781 is a deficient number, since it is larger than the sum of its proper divisors (68026884259).

320552530781 is a wasteful number, since it uses less digits than its factorization.

320552530781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 320552530781 in words is "three hundred twenty billion, five hundred fifty-two million, five hundred thirty thousand, seven hundred eighty-one".