5645351646 has 32 divisors (see below), whose sum is σ = 13685702400. Its totient is φ = 1710712440.

The previous prime is 5645351639. The next prime is 5645351659. The reversal of 5645351646 is 6461535465.

5645351646 is a `hidden beast` number, since 5 + 64 + 535 + 16 + 46 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4751386 + ... + 4752573.

It is an arithmetic number, because the mean of its divisors is an integer number (427678200).

Almost surely, 2^5645351646 is an apocalyptic number.

5645351646 is an abundant number, since it is smaller than the sum of its proper divisors (8040350754).

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

5645351646 is a wasteful number, since it uses less digits than its factorization.

5645351646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9503981 (or 9503975 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The square root of 5645351646 is about 75135.5551386958. Note that the first 3 decimals coincide. The cubic root of 5645351646 is about 1780.5889190913.

The spelling of 5645351646 in words is "five billion, six hundred forty-five million, three hundred fifty-one thousand, six hundred forty-six".