646102224505 has 4 divisors (see below), whose sum is σ = 775322669412. Its totient is φ = 516881779600.

The previous prime is 646102224491. The next prime is 646102224569. The reversal of 646102224505 is 505422201646.

It is a happy number.

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 276852764224 + 369249460281 = 526168^2 + 607659^2 .

It is not a de Polignac number, because 646102224505 - 2⁵ = 646102224473 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, 64610222446 + ... + 64610222455.

It is an arithmetic number, because the mean of its divisors is an integer number (193830667353).

Almost surely, 2^646102224505 is an apocalyptic number.

It is an amenable number.

646102224505 is a deficient number, since it is larger than the sum of its proper divisors (129220444907).

646102224505 is a wasteful number, since it uses less digits than its factorization.

646102224505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129220444906.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 646102224505 in words is "six hundred forty-six billion, one hundred two million, two hundred twenty-four thousand, five hundred five".