650643536623 has 4 divisors (see below), whose sum is σ = 650674882008. Its totient is φ = 650612191240.

The previous prime is 650643536581. The next prime is 650643536629. The reversal of 650643536623 is 326635346056.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650643536623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650643536629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15641536 + ... + 15683077.

It is an arithmetic number, because the mean of its divisors is an integer number (162668720502).

Almost surely, 2^650643536623 is an apocalyptic number.

650643536623 is a deficient number, since it is larger than the sum of its proper divisors (31345385).

650643536623 is a wasteful number, since it uses less digits than its factorization.

650643536623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31345384.

The product of its (nonzero) digits is 6998400, while the sum is 49.

The spelling of 650643536623 in words is "six hundred fifty billion, six hundred forty-three million, five hundred thirty-six thousand, six hundred twenty-three".