165835740856 has 8 divisors (see below), whose sum is σ = 310942014120. Its totient is φ = 82917870424.

The previous prime is 165835740839. The next prime is 165835740857. The reversal of 165835740856 is 658047538561.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×165835740856² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165835740856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165835740857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10364733796 + ... + 10364733811.

It is an arithmetic number, because the mean of its divisors is an integer number (38867751765).

Almost surely, 2^165835740856 is an apocalyptic number.

It is an amenable number.

165835740856 is a deficient number, since it is larger than the sum of its proper divisors (145106273264).

165835740856 is a wasteful number, since it uses less digits than its factorization.

165835740856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20729467613 (or 20729467609 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 58.

The spelling of 165835740856 in words is "one hundred sixty-five billion, eight hundred thirty-five million, seven hundred forty thousand, eight hundred fifty-six".