646222047 has 8 divisors (see below), whose sum is σ = 861815040. Its totient is φ = 430721880.

The previous prime is 646222009. The next prime is 646222141. The reversal of 646222047 is 740222646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 646222047 - 2¹¹ = 646219999 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646221999 and 646222017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646222847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4897 + ... + 36282.

It is an arithmetic number, because the mean of its divisors is an integer number (107726880).

Almost surely, 2^646222047 is an apocalyptic number.

646222047 is a deficient number, since it is larger than the sum of its proper divisors (215592993).

646222047 is a wasteful number, since it uses less digits than its factorization.

646222047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46413.

The product of its (nonzero) digits is 32256, while the sum is 33.

The square root of 646222047 is about 25420.8978401629. The cubic root of 646222047 is about 864.5575814568.

The spelling of 646222047 in words is "six hundred forty-six million, two hundred twenty-two thousand, forty-seven".