1645408412 has 24 divisors (see below), whose sum is σ = 2901652992. Its totient is φ = 816390000.

The previous prime is 1645408411. The next prime is 1645408423. The reversal of 1645408412 is 2148045461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645408411) 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 7 ways as a sum of consecutive naturals, for example, 281237 + ... + 287027.

It is an arithmetic number, because the mean of its divisors is an integer number (120902208).

Almost surely, 2^1645408412 is an apocalyptic number.

It is an amenable number.

1645408412 is a deficient number, since it is larger than the sum of its proper divisors (1256244580).

1645408412 is a wasteful number, since it uses less digits than its factorization.

1645408412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6329 (or 6327 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 1645408412 is about 40563.6341074120. The cubic root of 1645408412 is about 1180.5686266412.

The spelling of 1645408412 in words is "one billion, six hundred forty-five million, four hundred eight thousand, four hundred twelve".