165796234640 has 80 divisors (see below), whose sum is σ = 389489124672. Its totient is φ = 65629420032.

The previous prime is 165796234613. The next prime is 165796234651. The reversal of 165796234640 is 46432697561.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 8524607 + ... + 8544033.

Almost surely, 2^165796234640 is an apocalyptic number.

165796234640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165796234640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194744562336).

165796234640 is an abundant number, since it is smaller than the sum of its proper divisors (223692890032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165796234640 is a wasteful number, since it uses less digits than its factorization.

165796234640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20544 (or 20538 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 53.

The spelling of 165796234640 in words is "one hundred sixty-five billion, seven hundred ninety-six million, two hundred thirty-four thousand, six hundred forty".