331640807693 has 8 divisors (see below), whose sum is σ = 357638895768. Its totient is φ = 305712327744.

The previous prime is 331640807683. The next prime is 331640807833. The reversal of 331640807693 is 396708046133.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 180520465129 + 151120342564 = 424877^2 + 388742^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 331640807693 - 2⁶ = 331640807629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331640807683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17392130 + ... + 17411187.

It is an arithmetic number, because the mean of its divisors is an integer number (44704861971).

Almost surely, 2^331640807693 is an apocalyptic number.

It is an amenable number.

331640807693 is a deficient number, since it is larger than the sum of its proper divisors (25998088075).

331640807693 is a wasteful number, since it uses less digits than its factorization.

331640807693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34804063.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 331640807693 in words is "three hundred thirty-one billion, six hundred forty million, eight hundred seven thousand, six hundred ninety-three".