165635489928240 has 320 divisors, whose sum is σ = 575041209292800. Its totient is φ = 43820754278400.

The previous prime is 165635489928221. The next prime is 165635489928253. The reversal of 165635489928240 is 42829984536561.

165635489928240 is a `hidden beast` number, since 1 + 6 + 5 + 6 + 35 + 489 + 92 + 8 + 24 + 0 = 666.

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 166144860 + ... + 167138820.

It is an arithmetic number, because the mean of its divisors is an integer number (1797003779040).

Almost surely, 2^{165635489928240} is an apocalyptic number.

165635489928240 is a gapful number since it is divisible by the number (10) 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 165635489928240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287520604646400).

165635489928240 is an abundant number, since it is smaller than the sum of its proper divisors (409405719364560).

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

165635489928240 is a wasteful number, since it uses less digits than its factorization.

165635489928240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994593 (or 994581 counting only the distinct ones).

The product of its (nonzero) digits is 895795200, while the sum is 72.

The spelling of 165635489928240 in words is "one hundred sixty-five trillion, six hundred thirty-five billion, four hundred eighty-nine million, nine hundred twenty-eight thousand, two hundred forty".