1645354882 has 8 divisors (see below), whose sum is σ = 2469113676. Its totient is φ = 822316992.

The previous prime is 1645354873. The next prime is 1645354901. The reversal of 1645354882 is 2884535461.

It can be written as a sum of positive squares in 2 ways, for example, as 1506138481 + 139216401 = 38809^2 + 11799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174483 + ... + 183670.

Almost surely, 2^1645354882 is an apocalyptic number.

1645354882 is a deficient number, since it is larger than the sum of its proper divisors (823758794).

1645354882 is a wasteful number, since it uses less digits than its factorization.

1645354882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360452.

The product of its digits is 921600, while the sum is 46.

The square root of 1645354882 is about 40562.9742745771. The cubic root of 1645354882 is about 1180.5558240399. Note that the first 3 decimals are identical.

The spelling of 1645354882 in words is "one billion, six hundred forty-five million, three hundred fifty-four thousand, eight hundred eighty-two".