165378873504 has 288 divisors, whose sum is σ = 488279897280. Its totient is φ = 48930545664.

The previous prime is 165378873487. The next prime is 165378873551. The reversal of 165378873504 is 405378873561.

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, 147264687 + ... + 147265809.

It is an arithmetic number, because the mean of its divisors is an integer number (1695416310).

Almost surely, 2^165378873504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165378873504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244139948640).

165378873504 is an abundant number, since it is smaller than the sum of its proper divisors (322901023776).

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

165378873504 is a wasteful number, since it uses less digits than its factorization.

165378873504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 57.

Adding to 165378873504 its sum of digits (57), we get a palindrome (165378873561).

The spelling of 165378873504 in words is "one hundred sixty-five billion, three hundred seventy-eight million, eight hundred seventy-three thousand, five hundred four".