331138882765 has 4 divisors (see below), whose sum is σ = 397366659324. Its totient is φ = 264911106208.

The previous prime is 331138882757. The next prime is 331138882771. The reversal of 331138882765 is 567288831133.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567288831133 = 591407 ⋅959219.

It can be written as a sum of positive squares in 2 ways, for example, as 137372527044 + 193766355721 = 370638^2 + 440189^2 .

It is a cyclic number.

It is not a de Polignac number, because 331138882765 - 2³ = 331138882757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33113888272 + ... + 33113888281.

It is an arithmetic number, because the mean of its divisors is an integer number (99341664831).

Almost surely, 2^331138882765 is an apocalyptic number.

It is an amenable number.

331138882765 is a deficient number, since it is larger than the sum of its proper divisors (66227776559).

331138882765 is an equidigital number, since it uses as much as digits as its factorization.

331138882765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66227776558.

The product of its digits is 5806080, while the sum is 55.

The spelling of 331138882765 in words is "three hundred thirty-one billion, one hundred thirty-eight million, eight hundred eighty-two thousand, seven hundred sixty-five".