840634115329 has 4 divisors (see below), whose sum is σ = 841081977684. Its totient is φ = 840186252976.

The previous prime is 840634115311. The next prime is 840634115369. The reversal of 840634115329 is 923511436048.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 503351937729 + 337282177600 = 709473^2 + 580760^2 .

It is a cyclic number.

It is not a de Polignac number, because 840634115329 - 2²⁵ = 840600560897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840634115369) 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, 223928362 + ... + 223932115.

It is an arithmetic number, because the mean of its divisors is an integer number (210270494421).

Almost surely, 2^840634115329 is an apocalyptic number.

It is an amenable number.

840634115329 is a deficient number, since it is larger than the sum of its proper divisors (447862355).

840634115329 is a wasteful number, since it uses less digits than its factorization.

840634115329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447862354.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 840634115329 in words is "eight hundred forty billion, six hundred thirty-four million, one hundred fifteen thousand, three hundred twenty-nine".