165697255360 has 504 divisors, whose sum is σ = 505982471904. Its totient is φ = 51218657280.

The previous prime is 165697255357. The next prime is 165697255379. The reversal of 165697255360 is 63552796561.

165697255360 is digitally balanced in base 3, 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 71 ways as a sum of consecutive naturals, for example, 1548572427 + ... + 1548572533.

It is an arithmetic number, because the mean of its divisors is an integer number (1003933476).

Almost surely, 2^165697255360 is an apocalyptic number.

165697255360 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 165697255360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252991235952).

165697255360 is an abundant number, since it is smaller than the sum of its proper divisors (340285216544).

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

165697255360 is a wasteful number, since it uses less digits than its factorization.

165697255360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 10206000, while the sum is 55.

The spelling of 165697255360 in words is "one hundred sixty-five billion, six hundred ninety-seven million, two hundred fifty-five thousand, three hundred sixty".