165819483648 has 480 divisors, whose sum is σ = 597183402816. Its totient is φ = 43125571584.

The previous prime is 165819483611. The next prime is 165819483701. The reversal of 165819483648 is 846384918561.

165819483648 is a `hidden beast` number, since 1 + 6 + 581 + 9 + 4 + 8 + 3 + 6 + 48 = 666.

It is a super-2 number, since 2×165819483648² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30608236 + ... + 30613652.

Almost surely, 2^165819483648 is an apocalyptic number.

165819483648 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 165819483648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298591701408).

165819483648 is an abundant number, since it is smaller than the sum of its proper divisors (431363919168).

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

165819483648 is a wasteful number, since it uses less digits than its factorization.

165819483648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5534 (or 5515 counting only the distinct ones).

The product of its digits is 39813120, while the sum is 63.

The spelling of 165819483648 in words is "one hundred sixty-five billion, eight hundred nineteen million, four hundred eighty-three thousand, six hundred forty-eight".