1645846416 has 30 divisors (see below), whose sum is σ = 4606084470. Its totient is φ = 548615424.

The previous prime is 1645846361. The next prime is 1645846417. The reversal of 1645846416 is 6146485461.

1645846416 is a `hidden beast` number, since 1 + 6 + 4 + 584 + 64 + 1 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 948886416 + 696960000 = 30804^2 + 26400^2 .

It is not an unprimeable number, because it can be changed into a prime (1645846417) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5714601 + ... + 5714888.

It is an arithmetic number, because the mean of its divisors is an integer number (153536149).

Almost surely, 2^1645846416 is an apocalyptic number.

1645846416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1645846416 is an abundant number, since it is smaller than the sum of its proper divisors (2960238054).

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

1645846416 is a wasteful number, since it uses less digits than its factorization.

1645846416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11429503 (or 11429494 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 1645846416 is about 40569.0327220159. The cubic root of 1645846416 is about 1180.6733722474.

The spelling of 1645846416 in words is "one billion, six hundred forty-five million, eight hundred forty-six thousand, four hundred sixteen".