165527785856 has 64 divisors (see below), whose sum is σ = 342468329280. Its totient is φ = 79632419328.

The previous prime is 165527785837. The next prime is 165527785879. The reversal of 165527785856 is 658587725561.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 165527785792 and 165527785801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144335 + ... + 593201.

It is an arithmetic number, because the mean of its divisors is an integer number (5351067645).

Almost surely, 2^165527785856 is an apocalyptic number.

165527785856 is a gapful number since it is divisible by the number (16) 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 165527785856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171234164640).

165527785856 is an abundant number, since it is smaller than the sum of its proper divisors (176940543424).

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

165527785856 is an equidigital number, since it uses as much as digits as its factorization.

165527785856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448991 (or 448979 counting only the distinct ones).

The product of its digits is 141120000, while the sum is 65.

The spelling of 165527785856 in words is "one hundred sixty-five billion, five hundred twenty-seven million, seven hundred eighty-five thousand, eight hundred fifty-six".