643425503303 has 12 divisors (see below), whose sum is σ = 707257399464. Its totient is φ = 584914822800.

The previous prime is 643425503297. The next prime is 643425503389. The reversal of 643425503303 is 303305524346.

It is not a de Polignac number, because 643425503303 - 2¹² = 643425499207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643425503393) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5763725 + ... + 5874297.

It is an arithmetic number, because the mean of its divisors is an integer number (58938116622).

Almost surely, 2^643425503303 is an apocalyptic number.

643425503303 is a deficient number, since it is larger than the sum of its proper divisors (63831896161).

643425503303 is a wasteful number, since it uses less digits than its factorization.

643425503303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158686 (or 158675 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 38.

The spelling of 643425503303 in words is "six hundred forty-three billion, four hundred twenty-five million, five hundred three thousand, three hundred three".