64536718866550 has 24 divisors (see below), whose sum is σ = 137186625248496. Its totient is φ = 22126875039840.

The previous prime is 64536718866491. The next prime is 64536718866553. The reversal of 64536718866550 is 5566881763546.

64536718866550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×64536718866550³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a self number, because there is not a number n which added to its sum of digits gives 64536718866550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64536718866553) 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 11 ways as a sum of consecutive naturals, for example, 92195312317 + ... + 92195313016.

It is an arithmetic number, because the mean of its divisors is an integer number (5716109385354).

Almost surely, 2^{64536718866550} is an apocalyptic number.

64536718866550 is an abundant number, since it is smaller than the sum of its proper divisors (72649906381946).

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

64536718866550 is a wasteful number, since it uses less digits than its factorization.

64536718866550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184390625352 (or 184390625347 counting only the distinct ones).

The product of its (nonzero) digits is 870912000, while the sum is 70.

The spelling of 64536718866550 in words is "sixty-four trillion, five hundred thirty-six billion, seven hundred eighteen million, eight hundred sixty-six thousand, five hundred fifty".