165561151060500 has 384 divisors, whose sum is σ = 528296504526336. Its totient is φ = 40040967168000.

The previous prime is 165561151060489. The next prime is 165561151060523. The reversal of 165561151060500 is 5060151165561.

165561151060500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1078799772 + ... + 1078953228.

It is an arithmetic number, because the mean of its divisors is an integer number (1375772147204).

Almost surely, 2^{165561151060500} is an apocalyptic number.

165561151060500 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 165561151060500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264148252263168).

165561151060500 is an abundant number, since it is smaller than the sum of its proper divisors (362735353465836).

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

165561151060500 is a wasteful number, since it uses less digits than its factorization.

165561151060500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154460 (or 154448 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 42.

The spelling of 165561151060500 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty-one million, sixty thousand, five hundred".