64740906855 has 48 divisors (see below), whose sum is σ = 119080241280. Its totient is φ = 33725468448.

The previous prime is 64740906821. The next prime is 64740906859. The reversal of 64740906855 is 55860904746.

64740906855 is a `hidden beast` number, since 6 + 474 + 0 + 90 + 6 + 85 + 5 = 666.

It is not a de Polignac number, because 64740906855 - 2⁸ = 64740906599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64740906859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 567345 + ... + 671834.

It is an arithmetic number, because the mean of its divisors is an integer number (2480838360).

Almost surely, 2^64740906855 is an apocalyptic number.

64740906855 is a deficient number, since it is larger than the sum of its proper divisors (54339334425).

64740906855 is a wasteful number, since it uses less digits than its factorization.

64740906855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239242 (or 1239230 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 64740906855 in words is "sixty-four billion, seven hundred forty million, nine hundred six thousand, eight hundred fifty-five".