165487961088 has 264 divisors, whose sum is σ = 497147979328. Its totient is φ = 54983909376.

The previous prime is 165487961059. The next prime is 165487961101. The reversal of 165487961088 is 880169784561.

165487961088 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 8 + 7 + 9 + 610 + 8 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92813445 + ... + 92815227.

Almost surely, 2^165487961088 is an apocalyptic number.

165487961088 is a gapful number since it is divisible by the number (18) 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 165487961088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248573989664).

165487961088 is an abundant number, since it is smaller than the sum of its proper divisors (331660018240).

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

165487961088 is an equidigital number, since it uses as much as digits as its factorization.

165487961088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191 (or 2161 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 63.

The spelling of 165487961088 in words is "one hundred sixty-five billion, four hundred eighty-seven million, nine hundred sixty-one thousand, eighty-eight".