646426003 has 8 divisors (see below), whose sum is σ = 685474272. Its totient is φ = 607491456.

The previous prime is 646425947. The next prime is 646426013. The reversal of 646426003 is 300624646.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646426003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646426013) 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, 16575 + ... + 39592.

It is an arithmetic number, because the mean of its divisors is an integer number (85684284).

Almost surely, 2^646426003 is an apocalyptic number.

646426003 is a deficient number, since it is larger than the sum of its proper divisors (39048269).

646426003 is a wasteful number, since it uses less digits than its factorization.

646426003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56861.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 646426003 is about 25424.9091050489. The cubic root of 646426003 is about 864.6485270583.

The spelling of 646426003 in words is "six hundred forty-six million, four hundred twenty-six thousand, three".