165187383680 has 256 divisors, whose sum is σ = 464046796800. Its totient is φ = 55601356800.

The previous prime is 165187383661. The next prime is 165187383701. The reversal of 165187383680 is 86383781561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5003066 + ... + 5035974.

It is an arithmetic number, because the mean of its divisors is an integer number (1812682800).

Almost surely, 2^165187383680 is an apocalyptic number.

165187383680 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 165187383680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232023398400).

165187383680 is an abundant number, since it is smaller than the sum of its proper divisors (298859413120).

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

165187383680 is a wasteful number, since it uses less digits than its factorization.

165187383680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32993 (or 32981 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 165187383680 in words is "one hundred sixty-five billion, one hundred eighty-seven million, three hundred eighty-three thousand, six hundred eighty".