642428650203 has 16 divisors (see below), whose sum is σ = 857003846400. Its totient is φ = 428069682656.

The previous prime is 642428650187. The next prime is 642428650207. The reversal of 642428650203 is 302056824246.

It is a cyclic number.

It is not a de Polignac number, because 642428650203 - 2⁴ = 642428650187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (642428650207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93115648 + ... + 93122546.

It is an arithmetic number, because the mean of its divisors is an integer number (53562740400).

Almost surely, 2^642428650203 is an apocalyptic number.

642428650203 is a deficient number, since it is larger than the sum of its proper divisors (214575196197).

642428650203 is a wasteful number, since it uses less digits than its factorization.

642428650203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18066.

The product of its (nonzero) digits is 552960, while the sum is 42.

The spelling of 642428650203 in words is "six hundred forty-two billion, four hundred twenty-eight million, six hundred fifty thousand, two hundred three".