650405144401 has 4 divisors (see below), whose sum is σ = 650638350900. Its totient is φ = 650171937904.

The previous prime is 650405144383. The next prime is 650405144407. The reversal of 650405144401 is 104441504056.

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 136344824001 + 514060320400 = 369249^2 + 716980^2 .

It is a cyclic number.

It is not a de Polignac number, because 650405144401 - 2¹¹ = 650405142353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650405144407) 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 3 ways as a sum of consecutive naturals, for example, 116599066 + ... + 116604643.

It is an arithmetic number, because the mean of its divisors is an integer number (162659587725).

Almost surely, 2^650405144401 is an apocalyptic number.

It is an amenable number.

650405144401 is a deficient number, since it is larger than the sum of its proper divisors (233206499).

650405144401 is a wasteful number, since it uses less digits than its factorization.

650405144401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233206498.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 650405144401 its reverse (104441504056), we get a palindrome (754846648457).

The spelling of 650405144401 in words is "six hundred fifty billion, four hundred five million, one hundred forty-four thousand, four hundred one".