64955550505 has 4 divisors (see below), whose sum is σ = 77946660612. Its totient is φ = 51964440400.

The previous prime is 64955550449. The next prime is 64955550587. The reversal of 64955550505 is 50505555946.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50782171801 + 14173378704 = 225349^2 + 119052^2 .

It is not a de Polignac number, because 64955550505 - 2¹⁹ = 64955026217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6495555046 + ... + 6495555055.

It is an arithmetic number, because the mean of its divisors is an integer number (19486665153).

Almost surely, 2^64955550505 is an apocalyptic number.

It is an amenable number.

64955550505 is a deficient number, since it is larger than the sum of its proper divisors (12991110107).

64955550505 is a wasteful number, since it uses less digits than its factorization.

64955550505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12991110106.

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 64955550505 in words is "sixty-four billion, nine hundred fifty-five million, five hundred fifty thousand, five hundred five".