165219486784 has 189 divisors, whose sum is σ = 374888025813. Its totient is φ = 72189427200.

The previous prime is 165219486767. The next prime is 165219486787. The reversal of 165219486784 is 487684912561.

The square root of 165219486784 is 406472.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19356600384 + 145862886400 = 139128^2 + 381920^2 .

It is not an unprimeable number, because it can be changed into a prime (165219486787) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1108855542 + ... + 1108855690.

Almost surely, 2^165219486784 is an apocalyptic number.

165219486784 is the 406472-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165219486784

165219486784 is an abundant number, since it is smaller than the sum of its proper divisors (209668539029).

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

165219486784 is an equidigital number, since it uses as much as digits as its factorization.

165219486784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394 (or 193 counting only the distinct ones).

The product of its digits is 23224320, while the sum is 61.

The spelling of 165219486784 in words is "one hundred sixty-five billion, two hundred nineteen million, four hundred eighty-six thousand, seven hundred eighty-four".