320875798681 has 9 divisors (see below), whose sum is σ = 326440551423. Its totient is φ = 315404371200.

The previous prime is 320875798667. The next prime is 320875798687. The reversal of 320875798681 is 186897578023.

It is a happy number.

The square root of 320875798681 is 566459.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 248493277081 + 72382521600 = 498491^2 + 269040^2 .

It is not a de Polignac number, because 320875798681 - 2⁷ = 320875798553 is a prime.

It is a super-2 number, since 2×320875798681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320875798687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33416281 + ... + 33425881.

Almost surely, 2^320875798681 is an apocalyptic number.

320875798681 is the 566459-th square number.

320875798681 is the 283230-th centered octagonal number.

It is an amenable number.

320875798681 is a deficient number, since it is larger than the sum of its proper divisors (5564752742).

320875798681 is an frugal number, since it uses more digits than its factorization.

320875798681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19320 (or 9660 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 64.

Multiplying 320875798681 by its sum of digits (64), we get a square (20536051115584 = 4531672²).

The spelling of 320875798681 in words is "three hundred twenty billion, eight hundred seventy-five million, seven hundred ninety-eight thousand, six hundred eighty-one".