165350736720 has 400 divisors, whose sum is σ = 620831430912. Its totient is φ = 40545930240.

The previous prime is 165350736709. The next prime is 165350736721. The reversal of 165350736720 is 27637053561.

165350736720 is a `hidden beast` number, since 1 + 65 + 3 + 507 + 3 + 67 + 20 = 666.

It is a super-2 number, since 2×165350736720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165350736721) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 22825419 + ... + 22832661.

Almost surely, 2^165350736720 is an apocalyptic number.

165350736720 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 165350736720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310415715456).

165350736720 is an abundant number, since it is smaller than the sum of its proper divisors (455480694192).

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

165350736720 is a wasteful number, since it uses less digits than its factorization.

165350736720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7552 (or 7537 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The spelling of 165350736720 in words is "one hundred sixty-five billion, three hundred fifty million, seven hundred thirty-six thousand, seven hundred twenty".