1603430863818 has 128 divisors (see below), whose sum is σ = 3937666867200. Its totient is φ = 425576137728.

The previous prime is 1603430863799. The next prime is 1603430863823. The reversal of 1603430863818 is 8183680343061.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3140146 + ... + 3614882.

It is an arithmetic number, because the mean of its divisors is an integer number (30763022400).

Almost surely, 2^{1603430863818} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1603430863818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1968833433600).

1603430863818 is an abundant number, since it is smaller than the sum of its proper divisors (2334236003382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1603430863818 is a wasteful number, since it uses less digits than its factorization.

1603430863818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474884.

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 1603430863818 in words is "one trillion, six hundred three billion, four hundred thirty million, eight hundred sixty-three thousand, eight hundred eighteen".