834121740699521 has 16 divisors (see below), whose sum is σ = 865898220768768. Its totient is φ = 802656568425600.

The previous prime is 834121740699487. The next prime is 834121740699581. The reversal of 834121740699521 is 125996047121438.

It is a cyclic number.

It is not a de Polignac number, because 834121740699521 - 2¹⁰ = 834121740698497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (834121740699581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50947610 + ... + 65298563.

It is an arithmetic number, because the mean of its divisors is an integer number (54118638798048).

It is a 1-persistent number, because it is pandigital, but 2⋅834121740699521 = 1668243481399042 is not.

Almost surely, 2^{834121740699521} is an apocalyptic number.

It is an amenable number.

834121740699521 is a deficient number, since it is larger than the sum of its proper divisors (31776480069247).

834121740699521 is a wasteful number, since it uses less digits than its factorization.

834121740699521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116247512.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 834121740699521 in words is "eight hundred thirty-four trillion, one hundred twenty-one billion, seven hundred forty million, six hundred ninety-nine thousand, five hundred twenty-one".