1645244160 has 288 divisors, whose sum is σ = 6076664832. Its totient is φ = 371589120.

The previous prime is 1645244141. The next prime is 1645244191. The reversal of 1645244160 is 614425461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2607045 + ... + 2607675.

Almost surely, 2^1645244160 is an apocalyptic number.

1645244160 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 1645244160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038332416).

1645244160 is an abundant number, since it is smaller than the sum of its proper divisors (4431420672).

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

1645244160 is an equidigital number, since it uses as much as digits as its factorization.

1645244160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1645244160 is about 40561.6094355241. The cubic root of 1645244160 is about 1180.5293421270.

The spelling of 1645244160 in words is "one billion, six hundred forty-five million, two hundred forty-four thousand, one hundred sixty".