1603778680 has 32 divisors (see below), whose sum is σ = 4124003040. Its totient is φ = 549866880.

The previous prime is 1603778647. The next prime is 1603778689. The reversal of 1603778680 is 868773061.

It is a self number, because there is not a number n which added to its sum of digits gives 1603778680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603778689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2863611 + ... + 2864170.

It is an arithmetic number, because the mean of its divisors is an integer number (128875095).

Almost surely, 2^1603778680 is an apocalyptic number.

1603778680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1603778680 is an abundant number, since it is smaller than the sum of its proper divisors (2520224360).

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

1603778680 is a wasteful number, since it uses less digits than its factorization.

1603778680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5727799 (or 5727795 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 1603778680 is about 40047.2056453381. The cubic root of 1603778680 is about 1170.5271153476.

The spelling of 1603778680 in words is "one billion, six hundred three million, seven hundred seventy-eight thousand, six hundred eighty".