331386138386 has 16 divisors (see below), whose sum is σ = 526497552504. Its totient is φ = 155893561344.

The previous prime is 331386138371. The next prime is 331386138401. The reversal of 331386138386 is 683831683133.

It is an interprime number because it is at equal distance from previous prime (331386138371) and next prime (331386138401).

It can be written as a sum of positive squares in 4 ways, for example, as 316427625361 + 14958513025 = 562519^2 + 122305^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549895 + ... + 1750698.

Almost surely, 2^331386138386 is an apocalyptic number.

331386138386 is a deficient number, since it is larger than the sum of its proper divisors (195111414118).

331386138386 is a wasteful number, since it uses less digits than its factorization.

331386138386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3303565.

The product of its digits is 4478976, while the sum is 53.

The spelling of 331386138386 in words is "three hundred thirty-one billion, three hundred eighty-six million, one hundred thirty-eight thousand, three hundred eighty-six".