646503423 has 8 divisors (see below), whose sum is σ = 862224000. Its totient is φ = 430892568.

The previous prime is 646503413. The next prime is 646503449. The reversal of 646503423 is 324305646.

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

It is not a de Polignac number, because 646503423 - 2⁵ = 646503391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646503413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12523 + ... + 38076.

It is an arithmetic number, because the mean of its divisors is an integer number (107778000).

Almost surely, 2^646503423 is an apocalyptic number.

646503423 is a deficient number, since it is larger than the sum of its proper divisors (215720577).

646503423 is a wasteful number, since it uses less digits than its factorization.

646503423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54861.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 646503423 is about 25426.4315821155. The cubic root of 646503423 is about 864.6830442428.

The spelling of 646503423 in words is "six hundred forty-six million, five hundred three thousand, four hundred twenty-three".