330797345981 has 4 divisors (see below), whose sum is σ = 331561312572. Its totient is φ = 330033379392.

The previous prime is 330797345929. The next prime is 330797345993. The reversal of 330797345981 is 189543797033.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189543797033 = 116329 ⋅1629377.

It can be written as a sum of positive squares in 2 ways, for example, as 38261316025 + 292536029956 = 195605^2 + 540866^2 .

It is a cyclic number.

It is not a de Polignac number, because 330797345981 - 2²² = 330793151677 is a prime.

It is a super-2 number, since 2×330797345981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 330797345981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330797345911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381982646 + ... + 381983511.

It is an arithmetic number, because the mean of its divisors is an integer number (82890328143).

Almost surely, 2^330797345981 is an apocalyptic number.

It is an amenable number.

330797345981 is a deficient number, since it is larger than the sum of its proper divisors (763966591).

330797345981 is an equidigital number, since it uses as much as digits as its factorization.

330797345981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763966590.

The product of its (nonzero) digits is 17146080, while the sum is 59.

The spelling of 330797345981 in words is "three hundred thirty billion, seven hundred ninety-seven million, three hundred forty-five thousand, nine hundred eighty-one".