16165065620 has 72 divisors (see below), whose sum is σ = 38713096800. Its totient is φ = 5622591040.

The previous prime is 16165065619. The next prime is 16165065629. The reversal of 16165065620 is 2656056161.

It is a super-2 number, since 2×16165065620² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16165065629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46931 + ... + 185829.

It is an arithmetic number, because the mean of its divisors is an integer number (537681900).

Almost surely, 2^16165065620 is an apocalyptic number.

16165065620 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 16165065620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19356548400).

16165065620 is an abundant number, since it is smaller than the sum of its proper divisors (22548031180).

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

16165065620 is a wasteful number, since it uses less digits than its factorization.

16165065620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138965 (or 138940 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 16165065620 in words is "sixteen billion, one hundred sixty-five million, sixty-five thousand, six hundred twenty".