1645132480 has 224 divisors, whose sum is σ = 4336450560. Its totient is φ = 592220160.

The previous prime is 1645132441. The next prime is 1645132481. The reversal of 1645132480 is 842315461.

It is not an unprimeable number, because it can be changed into a prime (1645132481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15972109 + ... + 15972211.

Almost surely, 2^1645132480 is an apocalyptic number.

1645132480 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 1645132480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2168225280).

1645132480 is an abundant number, since it is smaller than the sum of its proper divisors (2691318080).

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

1645132480 is a wasteful number, since it uses less digits than its factorization.

1645132480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 1645132480 is about 40560.2327409496. The cubic root of 1645132480 is about 1180.5026298810.

The spelling of 1645132480 in words is "one billion, six hundred forty-five million, one hundred thirty-two thousand, four hundred eighty".