165870001296 has 240 divisors, whose sum is σ = 485099005248. Its totient is φ = 52862284800.

The previous prime is 165870001291. The next prime is 165870001303. The reversal of 165870001296 is 692100078561.

It is not an unprimeable number, because it can be changed into a prime (165870001291) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74681466 + ... + 74683686.

Almost surely, 2^165870001296 is an apocalyptic number.

165870001296 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 165870001296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242549502624).

165870001296 is an abundant number, since it is smaller than the sum of its proper divisors (319229003952).

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

165870001296 is a wasteful number, since it uses less digits than its factorization.

165870001296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510 (or 2501 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 165870001296 in words is "one hundred sixty-five billion, eight hundred seventy million, one thousand, two hundred ninety-six".