5646081865 has 8 divisors (see below), whose sum is σ = 6794713800. Its totient is φ = 4503921792.

The previous prime is 5646081841. The next prime is 5646081907. The reversal of 5646081865 is 5681806465.

It can be written as a sum of positive squares in 4 ways, for example, as 178810384 + 5467271481 = 13372^2 + 73941^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5646081865 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1616044 + ... + 1619533.

It is an arithmetic number, because the mean of its divisors is an integer number (849339225).

Almost surely, 2^5646081865 is an apocalyptic number.

It is an amenable number.

5646081865 is a deficient number, since it is larger than the sum of its proper divisors (1148631935).

5646081865 is a wasteful number, since it uses less digits than its factorization.

5646081865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235931.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The square root of 5646081865 is about 75140.4143254481. The cubic root of 5646081865 is about 1780.6656880796.

The spelling of 5646081865 in words is "five billion, six hundred forty-six million, eighty-one thousand, eight hundred sixty-five".