45640649865 has 16 divisors (see below), whose sum is σ = 73037880000. Its totient is φ = 24337399872.

The previous prime is 45640649851. The next prime is 45640649869. The reversal of 45640649865 is 56894604654.

It is not a de Polignac number, because 45640649865 - 2¹¹ = 45640647817 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45640649869) 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 15 ways as a sum of consecutive naturals, for example, 178395 + ... + 350864.

It is an arithmetic number, because the mean of its divisors is an integer number (4564867500).

Almost surely, 2^45640649865 is an apocalyptic number.

It is an amenable number.

45640649865 is a deficient number, since it is larger than the sum of its proper divisors (27397230135).

45640649865 is a wasteful number, since it uses less digits than its factorization.

45640649865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535016.

The product of its (nonzero) digits is 24883200, while the sum is 57.

The spelling of 45640649865 in words is "forty-five billion, six hundred forty million, six hundred forty-nine thousand, eight hundred sixty-five".