642513803603 has 4 divisors (see below), whose sum is σ = 734301489840. Its totient is φ = 550726117368.

The previous prime is 642513803527. The next prime is 642513803651. The reversal of 642513803603 is 306308315246.

642513803603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 642513803603 - 2²⁴ = 642497026387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642513803663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45893843108 + ... + 45893843121.

It is an arithmetic number, because the mean of its divisors is an integer number (183575372460).

Almost surely, 2^642513803603 is an apocalyptic number.

642513803603 is a deficient number, since it is larger than the sum of its proper divisors (91787686237).

642513803603 is an equidigital number, since it uses as much as digits as its factorization.

642513803603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91787686236.

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 642513803603 in words is "six hundred forty-two billion, five hundred thirteen million, eight hundred three thousand, six hundred three".